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A quick wide-field capture of something interesting that one doesn't have the opportunity to see often. Comet C/2016 M1 (PANSTARRS), passing between the constellation Norma and Ara (close to the Open Star Cluster NGC 6152) at 01:00 on 15 July 2018.

The Comet doesn't have much of a tail at the moment, but has a beautiful green coma. The green color is caused by Cyanogen (CN) and diatomic Carbon (C2), which glows green when illuminated by the Sun in space.

Click on the image to zoom in a bit LARGER.

Gear:

William Optics Star 71mm f/4.9 Imaging APO Refractor Telescope.

William Optics 50mm Finder Scope.

Celestron SkySync GPS Accessory.

Orion Mini 50mm Guide Scope.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

MBox USB Meteostation.

RoboFocus RF3 Focuser.

Optolong L-Pro & RGB filters.

QHYCFW2-M-US Filterwheel (7 position x 36mm).

QHY163M Cooled CMOS Monochrome Astronomy Camera.

Tech:

Guiding in Open PHD 2.6.5.

Image acquisition in Sequence Generator Pro.

Camera Settings:

QHY Sensor Sensitivity:

Gain: 120

Offset: 35

Imaged at -20°C

LRGB:

L = 10 x 30 sec.

R = 10 x 30 sec.

G = 10 x 30 sec.

B = 10 x 30 sec.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry info:

View an Annotated Sky Chart for this image.

Center RA, Dec: 248.960, -52.563

Center RA, hms: 16h 35m 50.336s

Center Dec, dms: -52° 33' 45.078"

Size: 2.93 x 2.22 deg

Radius: 1.837 deg

Pixel scale: 6.59 arcsec/pixel

Orientation: Up is 90.5 degrees E of N

View this image in the World Wide Telescope.

SQM-L Sky Quality Reading:

20.5

About the Milky Way, and Earth's place within it:

The Milky Way Galaxy is estimated to have over 400 billion stars. Stars are suns, and just like in our Solar System, many of the stars have planets with moons orbiting them. Our sun is a middle aged Yellow Dwarf star, located in the Orion Arm (or Orion Spur) of the Milky Way Galaxy. It’s a minor side spiral arm, located between two larger arms of the Milky Way Galaxy's spiral. The Milky Way is merely one mid-sized barred spiral Galaxy, amongst over 100 billion other Galaxies in the observable Universe. When we look up at the night sky from Earth, we see a glimpse of the Carina-Sagittarius Arm of the Milky Way Galaxy. It takes about 250 million years for the Milky Way Galaxy's spiral arms to complete one rotation.

The size, distance and age of the Universe is far beyond human comprehension. The known Universe is estimated to contain over One Billion Trillion stars.

1 000 000 000 000 000 000 000

Flickr Explore:

2018-07-16

Martin

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A cropped narrowband image of the Elephant's Trunk Nebula, a concentration of interstellar gas and dust with-in the much larger ionized gas region IC 1396 (located in the constellation Cepheus), about 2,400 light-years away from Earth.

Gear:

GSO 6" f/4 Imaging Newtonian Reflector Telescope.

Baader Mark-III MPCC Coma Corrector.

Celestron SkySync GPS Accessory.

Orion Mini 50mm Guide Scope.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

Aurora Flatfield Panel.

Optolong 36mm SHO filters.

QHYCFW2-M-US Filterwheel (7 position).

QHY163M Cooled CMOS Monochrome Astronomy Camera.

Lights/Subs:

Ha = 24 x 420 sec.

SII = 24 x 420 sec.

OIII = 24 x 420 sec.

Camera Settings:

Gain = 17 (equivalent to 170 now)

Offset = 70

CMOS Cooled to -25°C

Calibration Frames:

50 x Bias/Offset.

25 x Darks.

20 x Flats and Dark Flats.

Image Acquisition:

Sequence Generator Pro via the Mosaic and Framing Wizard.

Plate Solving in SGP via the Astrometry.net ANSVR Solver.

Autoguiding via Open PHD Guiding.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Wavelengths of the Electromagnetic Spectrum of Light:

Hydrogen-Alpha (656.3nm)

Oxygen-III (500.7nm)

Sulfur-II (672.4nm)

PixelMath:

Mapped Color Channel Combinations.

R = (0.5*SII)+(0.5*Ha)

G = (0.2*Ha)+(0.8*OIII)

B = OIII

Astrometry Info:

View an Annotated Sky Chart for this image.

Center RA, Dec: 323.737, 57.633

Center RA, hms: 21h 34m 56.902s

Center Dec, dms: +57° 37' 59.929"

Size: 46.8 x 60.6 arcmin

Radius: 0.638 deg

Pixel scale: 2.02 arcsec/pixel

Orientation: Up is 268 degrees E of N

View in the World Wide Telescope.

Martin

-

[Home Page] [Photography Showcase] [eBook] [Twitter]

[Facebook] [3D VFX & Mocap] [Science & Physics Page]

A time-lapse video of what seems to be a high altitude Satellite passing through my FOV whilst photographing around the beautiful region of Rho Ophiuchi (close to IC 4603).

About this video:

A time-lapse sequence of a Satellite captured in 10 x 3 minute (ISO 6400) exposures, travelling through my wide field Telescope's view. Note the object's rotation in the varying line thickness of each 3 minute exposure trail. Photographed in the rural dark skies of the Karoo (Northern Cape, South Africa).

Real-Time Duration: 30 minutes to cross 2 degrees of Arc.

About the Star Colors:

You will notice that star colors differ from red, orange and yellow, to blue. This is an indication of the temperature of the star's Nuclear Fusion process. This is determined by the size and mass of the star, and the stage of its life cycle. In short, the blue stars are hotter, and the red ones are cooler.

Gear:

GSO 6" f/4 Imaging Newtonian Reflector Telescope.

Baader Mark-III MPCC Coma Corrector.

Astronomik CLS Light Pollution Filter.

Orion StarShoot Autoguider.

Celestron AVX Mount.

Celestron StarSense.

Canon 60Da DSLR.

Tech:

Guiding in Open PHD 2.6.1.

Image acquisition in Sequence Generator Pro.

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry Info:

nova.astrometry.net/user_images/1187386#annotated&;

Basic FITS Header Data:

RA = 246.394201383277 / Object Right Ascension in degrees

DEC = -24.376321106111 / Object Declination in degrees

CRVAL1 = 246.394201383277 / RA at image center in degrees

CRVAL2 = -24.376321106111 / DEC at image center in degrees

OBJCTRA = '16 25 34.608' / Object Right Ascension in hms

OBJCTDEC = '-24 22 34.756' / Object Declination in degrees

AIRMASS = 1.25760852461339 / Average airmass

OBJCTALT= 53.0083763980286 / Altitude of the object

CENTALT = 53.0083763980286 / Altitude of the object

DATE-LOC= '2016-07-03T19:44:33' / Local observation date

DATE-OBS= '2016-07-03T17:44:33' / UTC observation date

Martin

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A sense of scale - a cosmic perceptive.

A wide-field mosaic of Messier 24 (M24), also known as the Sagittarius Star Cloud. M24 is a large Milky Way star cloud in the constellation Sagittarius.

The Sagittarius Star Cloud lies at an approximate distance of 10,000 light-years from Earth. It has the designation IC 4715 in the Index Catalogue of Nebulae and Clusters of Stars. M24 is about 600 light-years wide and lies in the Sagittarius Arm of the Milky Way Galaxy (the next inner spiral arm from the Orion Arm that our Solar System is located in). It occupies an area 90 arc minutes in apparent diameter and contains different types of objects, including stars and clusters that lie at a distance of 10,000 to 16,000 light years from Earth (which gives the cloud a significant depth). In the night sky, the star cloud appears about nine times larger than the full Moon.

About the Milky Way, and Earth's place within it:

The Milky Way Galaxy is estimated to have over 400 billion stars. Stars are suns, and just like in our Solar System, many of the stars have planets and moons. Our sun is a middle-aged Yellow Dwarf star, located in the Orion Arm (or Orion Spur) of the Milky Way Galaxy. It’s a minor side spiral arm, located between two larger arms of the Milky Way Galaxy's spiral. The Milky Way is merely one mid-sized barred spiral Galaxy, amongst over 100 billion other Galaxies in the observable Universe. When we look up at the night sky from Earth, we see a glimpse of the Carina–Sagittarius Arm of the Milky Way Galaxy. It takes about 250 million years for the Milky Way Galaxy's spiral arms to complete one rotation.

The size, distance and age of the Universe is far beyond human comprehension. The known Universe is estimated to contain over One Billion Trillion stars (the latest estimates are substantially higher).

A Billion Trillion Stars:

1 000 000 000 000 000 000 000

Image Acquisition:

Sequence Generator Pro with the Mosaic and Framing Wizard.

Plate Solving:

Astrometry.net ANSVR Solver via SGP.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop

Astrometry Info:

Annotated Sky Chart for this image.

RA, Dec center: 274.976540124, -18.8147939343 degrees

Orientation: 2.26265021784 deg E of N

Pixel scale: 8.50037285998 arcsec/pixel

View this image in World Wide Telescope.

Martin

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[Home Page] [Photography Showcase] [eBook] [Twitter]

[Facebook] [3D VFX & Mocap] [Science & Physics Page]

Ha+OIII+SII Narrowband widefieled image of a section of the North America Nebula (NGC 7000), including the Cygnus Wall and Pelican Nebulla (IC 5070). The North America Nebula is an emission nebula in the constellation Cygnus, close to the star Deneb.

The Cygnus Wall is a term for the "Mexico and Central America part" of the North America Nebula. The Cygnus Wall has the most concentrated star formation in the nebula. The North America Nebula and the nearby Pelican Nebula are in fact parts of the same interstellar cloud of ionized hydrogen (H II region). The nebula complex is estimated to be about 1,800 light-years from Earth.

Gear:

William Optics Star 71mm f/4.9 Imaging APO Refractor Telescope.

William Optics 50mm Finder Scope.

Celestron SkySync GPS Accessory.

Orion Mini 50mm Guide Scope.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

QHYCFW2-M-US Filterwheel (7 position x 36mm).

QHY163M Cooled CMOS Monochrome Astronomy Camera.

Tech:

Guiding in Open PHD 2.6.3.

Image acquisition in Sequence Generator Pro.

Lights/Subs:

2 Stage CMOS Cooling

Imaged at -25°C

Narrowband:

S = 8 x 300 sec. 16bit FITS.

H = 24 x 300 sec. 16bit FITS.

O = 16 x 300 sec. 16bit FITS.

Calibration Frames:

50 x Bias/Offset.

25 x Darks.

20 x Flats & Dark Flats.

Image Acquisition:

Sequence Generator Pro with the Mosaic and Framing Wizard.

Plate Solving:

Astrometry.net ANSVR Solver via SGP.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Photographed in the following wavelengths of light:

Optolong SHO Narrowband filters:

OIII line 500.7nm (6.5nm bandwidth)

H-alpha line 656nm (7nm bandwidth)

SII line 672nm (6.5nm bandwidth)

PixelMath Channel combination expression:

R = 0.5*SII + 0.5*Ha

G = 0.15*Ha + 0.85*OIII

B = OIII

Astrometry Info:

View an Annotated Sky Chart for this image.

Center RA, Dec: 313.661, 43.942

Center RA, hms: 20h 54m 38.668s

Center Dec, dms: +43° 56' 29.414"

Size: 2.43 x 1.92 deg

Radius: 1.549 deg.

Pixel scale: 5.47 arcsec/pixel

Orientation: Up is -92.4 degrees E of N

View this image in the World Wide Telescope.

Martin

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[Home Page] [Photography Showcase] [My Free Photo App]

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Per questa "Sh2-155", denominata anche "Nebulosa Grotta" credo che abbia osato troppo. Non immaginavo che fosse così ostica ma soprattutto così debole, e per peggiorare le cose l'ho fotografata non solo a Banda Stretta ma anche con un rapporto focale F/7. Complice il cielo Bortle5-6 della mia città (Biancavilla-CT) ma anche la sua non eccezionale trasparenza durante le 5 sessioni di acquisizione, le oltre 18 ore d'integrazione non sono bastate per raggiungere un buon rapporto segnale-rumore.

Alla fine le condizioni meteo avverse mi hanno fatto desistere ed ho cercato di fare il possibile in post-produzione concentrandomi più all'aspetto estetico generale e non alla ricerca dei dettagli. spero di esserci riuscito.

_____________

For this "Sh2-155", also called "Cave Nebula" I think I dared too much. I did not imagine it was so difficult but above all so weak, and to make things worse I photographed it not only in Narrow Band but also with a focal ratio F/7. Accomplice the Bortle5-6 sky of my city (Biancavilla-CT) but also its not exceptional transparency during the 5 acquisition sessions, the over 18 hours of integration were not enough to achieve a good signal-to-noise ratio.

In the end the adverse weather conditions made me give up and I tried to do my best in post-production focusing more on the general aesthetic aspect and not on the search for details. I hope I succeeded.

Google translate

_______________

Optic: APO Rifractor Scopos TL805 80mm/f7

Camera: ZWO ASI533MC-Pro

Mount: Sky Watcher HEQ5 Synscan

Seeing: 3-4 (scala Antoniadi)

Filter: Narrowband Optolong L-eNhance 2"

-54x600s 121gain / 21 dark /21 flat / 18 darkflat /100 bias

-109x300s 121gain / 26 dark /21 flat / 18 darkflat /100 bias

t° sensor: -10°C

Date: 18+19+23+24+25/11/2024

Integration: 18h 5min

Temperature: 12°C (media)

location for : Biancavilla -Catania-(Italy) 515m slm

Acquisition: NINA, PHDGuiding

Processing: DSS, SIRIL, PS, GraXpert.

A widefield HaRGB mosaic of the Veil Nebula Complex (Supernova Remnant).

The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop (radio source W78, or Sharpless 103), a large but relatively faint supernova remnant. The source supernova exploded circa 3,000 BC to 6,000 BC, and the remnants have since expanded to cover an area roughly 3 degrees in diameter (about 6 times the diameter, or 36 times the area, of the full moon).

The Veil Nebula Complex has three main visual components:

The Western Veil (also known as Caldwell 34), consisting of NGC 6960 (the "Witch's Broom", "Finger of God", or "Filamentary Nebula") near the foreground star 52 Cygni;

The Eastern Veil (also known as Caldwell 33), whose brightest area is NGC 6992, trailing off farther south into NGC 6995 (together with NGC 6992 also known as "Network Nebula") and IC 1340; and

Pickering's Triangle (or Pickering's Triangular Wisp), brightest at the north central edge of the loop, but visible in photographs continuing toward the central area of the loop.

NGC 6974 and NGC 6979 are luminous knots in a fainter patch of nebulosity on the northern rim between NGC 6992 and Pickering's Triangle.

Imaging:

Photographed in Adobe RGB and the Narrowband Hydrogen-Alpha (Hα) spectral line of 656.28nm.

Image Acquisition:

Sequence Generator Pro with the "Mosaic and Framing Wizard".

Plate Solving:

Astrometry.net ANSVR Blind Solver via SGP.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop

Astrometry Info:

RA, Dec center: 312.872737183, 31.1089230819 degrees

Orientation: 2.03140875657 deg E of N

Pixel scale: 9.65149745813 arcsec/pixel

Annotated Sky Chart for this image.

View this image in the interactive virtual World Wide Telescope.

Martin

-

[Home Page] [Photography Showcase] [My Free Photo App]

[Flickr Profile] [Facebook] [Twitter] [My Science & Physics Page]

A widefield HaRGB mosaic of the Veil Nebula Complex (Supernova Remnant).

The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop (radio source W78, or Sharpless 103), a large but relatively faint supernova remnant. The source supernova exploded circa 3,000 BC to 6,000 BC, and the remnants have since expanded to cover an area roughly 3 degrees in diameter (about 6 times the diameter, or 36 times the area, of the full moon).

The Veil Nebula Complex has three main visual components:

The Western Veil (also known as Caldwell 34), consisting of NGC 6960 (the "Witch's Broom", "Finger of God", or "Filamentary Nebula") near the foreground star 52 Cygni;

The Eastern Veil (also known as Caldwell 33), whose brightest area is NGC 6992, trailing off farther south into NGC 6995 (together with NGC 6992 also known as "Network Nebula") and IC 1340; and

Pickering's Triangle (or Pickering's Triangular Wisp), brightest at the north central edge of the loop, but visible in photographs continuing toward the central area of the loop.

NGC 6974 and NGC 6979 are luminous knots in a fainter patch of nebulosity on the northern rim between NGC 6992 and Pickering's Triangle.

About Star Colors:

You will notice that star colors differ from red, orange and yellow, to blue. This is an indication of the temperature of the star's Nuclear Fusion process. This is determined by the size and mass of the star, and the stage of its life cycle. In short, the blue stars are hotter, and the red ones are cooler.

Imaging:

Photographed in Adobe RGB and the Narrowband Hydrogen-Alpha (Hα) spectral line of 656.28nm.

Image Acquisition:

Sequence Generator Pro with the "Mosaic and Framing Wizard".

Plate Solving:

Astrometry.net ANSVR Blind Solver via SGP.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry Info:

View an Annotated Sky Chart of thie image.

Center RA, Dec: 312.888, 31.164

Center RA, hms: 20h 51m 33.081s

Center Dec, dms: +31° 09' 51.606"

Size: 3.3 x 2.46 deg

Radius: 2.059 deg

Pixel scale: 6.61 arcsec/pixel

Orientation: Up is 178 degrees E of N

Martin

-

[Home Page] [Photography Showcase] [My Free Photo App]

[Flickr Profile] [Facebook] [Twitter] [My Science & Physics Page]

Billions of stars...

Best viewed LARGE.

The image is not at full resolution, but is still best viewed LARGE. Zoom in and out by clicking on the image, or view in Lightbox Mode.

About this image:

A widefield mosaic of M8 and M20. This is a dense region of stars, interstellar dust clouds, and dark nebulae, reflection nebulae and emission nebulae.

The Trifid Nebula (M20)

The Trifid Nebula, a star-forming region in the Scutum spiral arm of the Milky Way Galaxy. The Trifid Nebula (M20, Messier 20 or NGC 6514) is an H II region located in Sagittarius. Trifid means 'divided into three lobes'. The object is an unusual combination of an open cluster of stars; an emission nebula (the red portion), a reflection nebula (the blue portion) and a dark nebula (the apparent 'gaps' within the emission nebula that cause the trifurcated appearance; these are also designated Barnard 85).

The Lagoon Nebula (M8)

The Lagoon Nebula (M8, Messier 8 or NGC 6523), a giant interstellar cloud in the constellation Sagittarius. The Lagoon Nebula is estimated to be between 4000 - 6000 light-years from Earth in the Milky Way Galaxy, and is classified as an emission nebula.

Image Acquisition:

Sequence Generator Pro with the Mosaic and Framing Wizard.

Plate Solving:

Astrometry.net ANSVR Solver via SGP.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop

Billions of stars...

The size, distance and age of the Universe is far beyond human comprehension. The known Universe is estimated to contain over One Billion Trillion stars (the latest estimates are substantially higher).

"Lost somewhere between immensity and eternity is our tiny planetary home." - Carl Sagan - Cosmos.

Astrometry Info:

View the Annotated Sky Chart for this image.

Center RA, Dec: 270.970, -23.524

Center RA, hms: 18h 03m 52.787s

Center Dec, dms: -23° 31' 24.628"

Size: 3.68 x 2.39 deg

Radius: 2.192 deg

Pixel scale: 6.47 arcsec/pixel

Orientation: Up is 91.7 degrees E of N

View this image in the World Wide Telescope.

Martin

-

[Home Page] [Photography Showcase] [My Free Photo App]

[Flickr Profile] [Facebook] [Twitter] [My Science & Physics Page]

E rimanendo nella costellazione dei Cani da Caccia ho puntato il mio telescopio all'ammasso globulare "M3", conosciuto anche con la sigla "NGC5272". E' uno degli ammassi globulari più luminosi e grandi della nostra galassia. Infatti conta circa 500.000 stelle.

Con M13 ed M5, M3 è uno dei tre ammassi globulari più brillanti dell'emisfero boreale, e contiene il maggior numero di variabili conosciute rispetto a tutti gli ammassi globulari conosciuti.

________________

And remaining in the constellation Canes Venatici, I pointed my telescope at the globular cluster "M3", also known by the acronym "NGC5272". It is one of the brightest and largest globular clusters in our galaxy, containing approximately 500,000 stars.

Along with M13 and M5, M3 is one of the three brightest globular clusters in the Northern Hemisphere, and contains the largest number of known variables of all known globular clusters.

______________

Optic: Celestron SC C8 203mm f/10 + Celestron riducer-corrector 0.63X

Camera: ZWO ASI533MC-Pro

Mount: Sky Watcher HEQ5 Synscan

Seeing: 4-5 (scala Antoniadi)

Filter: Astronomik CLS

-239x60s 121gain/ 50 darks /27 flats /80 biases

t° sensor: -10°C

Date: 2026-04-22+23

Integration: 3h 59m

Temperature: 13°C (media)

location for: Biancavilla -Catania-(Italy) 515m slm (Bortle 5-6) flic.kr/p/8AWHek lightpollutionmap.app/it/?lat=37.641252&lng=14.871604...

Acquisition: NINA, PHDGuiding

Processing: SIRIL1.4.2, GraXpert, SyQon-Prism, SyQon-Starless, PS

Click HERE for more astrophotography and details! ;)

► FOLLOW ME ON:

My Website

Facebook Page - Facebook Profile

YouTube - LinkedIn - Instagram

A wide field view of the Trifid Nebula, a star-forming region in the Scutum spiral arm of the Milky Way Galaxy. The Trifid Nebula (M20, Messier 20 or NGC 6514) is an H II region located in Sagittarius. It was discovered by Charles Messier on June 5, 1764. Its name means 'divided into three lobes'.

The object is an unusual combination of an open cluster of stars; an emission nebula (the red portion), a reflection nebula (the blue portion) and a dark nebula (the apparent 'gaps' within the emission nebula that cause the trifurcated appearance; these are also designated Barnard 85).

About this image:

A few short 2 minute ISO 3200 exposures, imaged in the rural dark skies of the Waterberg, Limpopo Province, South Africa.

About the Star Colors:

You will notice that star colors differ from red, orange and yellow, to blue. This is an indication of the temperature of the star's Nuclear Fusion process. This is determined by the size and mass of the star, and the stage of its life cycle. In short, the blue stars are hotter, and the red ones are cooler.

Gear:

GSO 6" f/4 Imaging Newtonian Reflector Telescope.

Baader Mark-III MPCC Coma Corrector.

Astronomik CLS Light Pollution Filter.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

Canon 60Da DSLR.

Tech:

Guiding in Open PHD 2.6.1.

Image acquisition in Sequence Generator Pro.

Lights/Subs: 15 x 120 sec. ISO 3200 CFA FIT Files.

Calibration Frames:

30 x Bias

30 x Darks

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry Info:

nova.astrometry.net/user_images/1164842#annotated

Martin

-

[Home Page] [Photography Showcase] [My Free Photo App]

[Flickr Profile] [Facebook] [Twitter] [My Science & Physics Page]

M81 & M82 - Bode and Cigar Galaxies

Canon EOS 60D and TS APO 804 Triplet on a HEQ5 unguided mount.

ENG: M81 is the principal member of the “M81 Group” which is composed of 34 galaxies 12 million of light years distant from us. M81, M82 and NGC3077 strongly interact with each other and this leads to increasing their star formation activity.

Since the star formation process of M82 is very strong compared to other galaxies, it's classified as “Starburst Galaxy”.

Some numbers: M81 contains 250 billion of stars and it’s far from the “near” M82 just about 200.000 light years, twice the diameter of our galaxy.

ITA: M81 è il membro principale del “Gruppo di M81” costituito da 34 galassie poste ad una distanza media di 12 milioni di anni luce. M81, M82 e NGC3077 interagiscono fortemente tra loro, questo porta ad un incremento della loro attività di formazione stellare.

Proprio per questo motivo M82 viene definita una galassia starbust, ovvero una galassia in cui il processo di formazione stellare è molto spinto rispetto alle altre galassie. Un’attività così spinta, però, porta ad un più veloce esaurimento delle scorte della stessa galassia.

Alcuni numeri: M81 contiene 250 miliardi di stelle e dista dalla compagna (M82) circa 200.000 anni luce, praticamente solo il doppio del diametro della nostra galassia.

► IN THE FOV:

Galaxies: M81, M82

► TECHNICAL DETAILS:

480mm - f/6.0 - ISO800

Light Frames: 37x150''

Dark Frames: 11x150''

Bias Frames: 25x

Click HERE for more astrophotography and details! ;)

► FOLLOW ME ON:

Portfolio - Blue Journey Astrophotography

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NGC 6334 (also known as the Cat's Paw Nebula, Bear Claw Nebula and Gum 64) is an emission nebula and star-forming region 5,500 light-yeas away in the constellation Scorpius. It was discovered by astronomer John Herschel in 1837, who observed it from the Cape of Good Hope in South Africa.

Emission nebulae are glowing clouds of interstellar gas which have been excited by some nearby energy source, usually a very hot star. The red light seen in this picture is glowing hydrogen captured in the Hydrogen-Alpha (Hα) Infrared wavelength of light at 656nm.

About this image:

2 minute ISO 3200 exposures, imaged in the rural dark skies of the Waterberg, Limpopo Province, South Africa.

Star Colors:

You will notice that star colors differ from red, orange and yellow, to blue. This is an indication of the temperature of the star's Nuclear Fusion process. This is determined by the size and mass of the star, and the stage of its life cycle. In short, the blue stars are hotter, and the red ones are cooler.

Gear:

GSO 6" f/4 Imaging Newtonian Reflector Telescope.

Baader Mark-III MPCC Coma Corrector.

Astronomik CLS Light Pollution Filter.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

Canon 60Da DSLR.

Tech:

Guiding in Open PHD 2.6.1.

Image acquisition in Sequence Generator Pro.

Lights/Subs: 15 x 120 sec. ISO 3200 CFA FIT Files.

Calibration Frames:

30 x Bias

30 x Darks

Pre-Processing and Linear workflow in PixInsight, and finished in Photoshop.

Astrometry Info:

nova.astrometry.net/user_images/1156498#annotated

RA, Dec center: 259.794674057, -35.8560064566 degrees

Orientation: 0.919617580021 deg E of N

Pixel scale: 5.29428727941 arcsec/pixel

Martin

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From Locoal-Mendon (Brittany)

Orion 10" f/3.9, HDX110 EQ-G, Unfiltered EOS 500D, ST80, SSAG

Acquisition : Astro Photography Tool, PHD Guiding

Processing : PixInsight

Addition of 60 images (60x300s, ISO800, f/3.9)

FoV : 1°17'x51'

en.wikipedia.org/wiki/Sh2-101

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Durante l'acquisizione di questa immagine ho dovuto "lottare" contro il cielo non trasparente, contro il fumo dell'Etna e persino la sua eruzione stromboliana con la ricaduta copiosa di cenere-sabbia vulcanica nera che ha dato non pochi problemi all'aeroporto di Catania e a causa dei venti sfavorevoli ha fermato pure me per 8 notti.

Ci troviamo nella costellazione del Cigno, in un tratto dell'equatore galattico, colmo di meraviglie celesti immerse in un mare di nebulose HII, OIII e di stelle. A destra l'inconfondibile "Nebulosa Tulipano", una grande nebulosa ad emissione nota anche con la siglia "Sh2-101", distante dalla Terra circa 6000 a.l. Nelle sue vicinanze prospettiche si può vedere il sistema binario denominato "Cygnus X-1"composto da una stella supergigante, catalogata come HDE 226868, e dal primo buco nero scoperto grazie anche alla sua forte emissione di raggi X e ai suoi getti di particelle ad alta energia, che provocano un' onda d'urto che a sua volta genera una struttura ad arco visibile qui con una colorazione azzurra, denominata "Bow Shock associata a Cygnus X-1".

Il campo inquadrato composto da 2 pannelli mostra altri oggetti Deep Sky, come gli ammassi aperti "NGC6871", "NGC6883" e IC1310 oltre a tante nebulose oscure, tra le quali le LDN 857, 860, 853, 856, 852, 847, 849, 858, 848 che si intrecciano tra le nebulose e i filamenti HII ed OIII.

Il Workflow non è stato per nulla semplice ma è stata per me una bella soddisfazione ammirare tutte queste meraviglie insieme alla miriade di stelle multicolore che fanno percepire quanto meraviglioso, unio e spettacolare sia l'Universo che ci cirdonda.

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While capturing this image, I had to contend with the opaque sky, the smoke from Mount Etna, and even its Strombolian eruption, which caused considerable disruption to Catania airport and, due to unfavorable winds, also held me up for eight nights.

We are in the constellation Cygnus, a stretch of the galactic equator, filled with celestial wonders immersed in a sea of HII and OIII nebulae and stars. On the right is the unmistakable "Tulip Nebula", a large emission nebula also known by the designation "Sh2-101", about 6000 light years away from Earth. In its prospective vicinity, you can see the binary system called "Cygnus X-1", composed of a supergiant star, cataloged as HDE 226868, and the first black hole discovered thanks to its strong X-ray emission and its jets of high-energy particles, which cause a shock wave that in turn generates an arched structure visible here with a blue color, called the "Bow Shock associated with Cygnus X-1".

The two-panel field of view shows other deep-sky objects, such as the open clusters "NGC6871", "NGC6883", and IC1310, as well as many dark nebulae, including LDN 857, 860, 853, 856, 852, 847, 849, 858, and 848, which are intertwined with the nebulae and the HII and OIII filaments.

The workflow was by no means simple, but it was a great satisfaction for me to admire all these wonders along with the myriad of multicolored stars that make us perceive how wonderful, unified, and spectacular the Universe around us is.

Google Translate

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Optic: APO Refractor Askar 103APO + 0.6X

Camera: ZWO ASI533MC-Pro

Mount: Sky Watcher HEQ5 Synscan

Seeing: 3-4 (scala Antoniadi)

Narrowband filter: Optolong L-eNhance 2"

-320x180s 250gain/ 25 darks/ 29 flats/ 80 biases (Panel 1)

-316x180s 250gain/ 25 darks/ 29 flats/ 80 biases (Panel 2)

t° sensor: -5°C

Date: 2026-07-26; 2026-08-02+03+04+08+17

Integration: 31h 46m

Temperature: 28°C (media)

location for: Biancavilla -Catania-(Italy) 515m slm (Bortle 5-6)

flic.kr/p/8AWHek

lightpollutionmap.app/it/?lat=37.641252&lng=14.871604...

Acquisition: NINA, PHDGuiding

Processing: SIRIL1.4.4, ARm, GraXpert, SyQon Prism, StarNet 2.5, PS

This is a widefield version of this area in Cygnus. It was taken at a veeery dark site in N. Michigan, this years trip to the Two-hearted River. Here are the particulars:

25 x 6mins, ISO 800, f5.6

Canon XSi, UV/IR Blocker Baader mod

Sigma 24-60mm @60mm

Astronomik CLS Clip-in

Acquired with Backyard EOS

Processed with DSS and CS2

Mounted on a Losmandy GM-8 mount and guided using PHDguide through an AT72ED scope

A two panel wide-field mosaic of the Blue Horsehead Nebula (IC 4592), a faint reflection nebula in the constellation Scorpius. The nebula is lit by the multiple Star System Nu Scorpii.

Gear:

William Optics Star 71mm f/4.9 Imaging APO Refractor Telescope.

QHY163M Sensor cooled to -20°C.

Technical Card:

Integration Time: 24 hours total (12 hours / panel)

L = 6 hours / panel (Binning 1x1)

R = 2 hours / panel (Binning 2x2)

G = 2 hours / panel (Binning 2x2)

B = 2 hours / panel (Binning 2x2)

Calibration frames:

Bias, Darks & Flats.

Image Acquisition:

Guiding in Open PHD.

Image acquisition in Sequence Generator Pro.

Plate Solving in Platesolve 2 via SGP Framing & Mosaic Wizzard.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Martin

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Original image:

www.flickr.com/photos/martin_heigan/49429708568

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The Milky Way's Neighbor.

Taken with an inexpensive Soligor 350mm/f5.6 lens on a very good Losmandy clock drive mount with Phd guiding software. 60 minutes total exposure time.

From Locoal-Mendon (Brittany)

TS-Optics 10" f/4 UNC, HDX110 EQ-G, ZWO ASI2600MC, ST80, SSAG

Acquisition : NINA, PHD Guiding

Processing : PixInsight

Addition of 60 images (60x300s, Gain:100, Offset:1, f/4)

FoV : 43'x29'

en.wikipedia.org/wiki/Dumbbell_Nebula

Instagram: @vincent.bchm

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NGC 1499 - California Nebula

This is my first finished astrophotography product. Taken from Lake Lawtonka, OK on December 3rd.

Details:

-Camera: modified Canon 450D

-Scope: Orion 80 ED refractor

-Mount: Orion Atlas EQ-G

-Guiding: Orion StarShoot Autoguider on Orion ST 80 with PHD Guiding software

-Exposure: 16 x 5 mins at ISO 800. 80 mins total exposure

-12 dark frames

-25 flat frames

-Calibrated, Aligned, and Stacked in Images Plus.

-Digital Development in Images Plus

-Levels, Curves, Color Enhancement, GradientXTerminator, Noise Ninja, and Sharpening in Photoshop CS4.

-Mount Control via EQMOD and Cartes du Ciel

-Camera Control via Images Plus

The Veil Nebula (part of it).

I used an unmodified Canon 5D, and I'm pretty unimpressed with the length of integration necessary to get this much of an image. Maybe it's time to look into a modified dSLR to capture more of the Hydrogen-alpha light. Although, I'm pretty happy with the amount of detail (check out the large view).

32 x 4 minute @ ISO1600

stacked in Deep Sky Stacker

Canon 5D through an Orion ED80

Autoguided with a Meade DSI Pro through an Orion ST80 using PHDGuiding

Celestron CG5 mount

The Crescent Nebula, also known as NGC 6888 is an emission nebula in the constellation Cygnus, it is approximately 5000 light years from earth.

The Image consists of:

33x5Min ISO 1600 RGB Image

35x5Min ISO 1600 HA on Red Channel Only

17 Dark Frames

53 Flat Frames for HA

53 Flat frames for RGB

Equipment used:

Canon 500D Modified and Cooled Imaging Camera

QHY5 CCD Autoguider

Astro-Tech AT8RC Imaginc Scope

Skywatcher NEQ6Pro GEM Mount

Software used for Image Acquisition:

Imaging: BackyardEOS (www.backyardeos.com)

Guiding: PHDGuide

Processing:

Nebulosity 2 for Preliminary Dark Frame and Flat Frame subtraction and stacking

Photoshop CS5 for post processing and stretching for both the RGB Image and HA Image, Photoshop was also used to merge the HA Data into the red channel of the RGB Image

Noise Ninja for Noise Reduction

Over the past year or so, I have had serious autoguiding issues with my setup. I had suspected that it was soemthing to do with my Serial cable adapter that sits between the laptop, which runs PHD Guiding, and the Celestron CGEM hand controller on my mount. So, I purchased an Orion Star Shoot AutoGuider (SSAG) which connects directly into the autoguiding port on the CGEM mount itself.

Installation of the SSAG drivers was fairly straightforward. I also downloaded the newer version of PHDGuiding (PHD2) which, I must say, has a slicker interface and a lot more options to explore.

So, before the moon came up last night I set up at a local dark sky spot and tried it out. After spending an hour-and-a-half wondering why nothing was working and finally figuring out that I had plugged the SSAG guide cable into the wrong port, the system worked flawlessly. I ran a test of several 5 minute exposures on M42, with this image being the result. No fancy processing here, just a few test captures to make sure my guiding was back on track.

The SSAG camera is great. Sensitive, love plugging directly into the guide port on my mount, and just super easy to use. I'm looking forward to getting back out there this year and shooting some more stuff!

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My DIY dual axis auto guide barn door tracker for Astrophotography, can auto guide in both RA and DEC axis using PHD Guiding software, it is controlled by an Arduino Uno wired up to two small stepper motors, and is interfaced to my laptop via an Ascom driver and USB cable.

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The Triangulum Galaxy is a spiral galaxy approximately 3 million light years from Earth

The Triangulum Galaxy is the third-largest member of the Local Group of galaxies, which includes the Milky Way Galaxy, the Andromeda Galaxy.

Image consists of:

43x10Min @ISO 800, 29 Darks and 40 Flats

Imaging Camera: Canon 500D Cooled to -20 Degrees C

Guide Camera: QHY5

Imaging Scope: Astro-Tech AT8RC

Mount: Skywatcher NEQ6Pro

Image Acquisition: BackyardEOS (www.backyardeos.com)

Guide Software: PHDGuide

Pre-Processing and Stacking: Nebulosity 2

Post Processing and Combining of HA: Photoshop CS5, Noise Ninja

Orion 10" f/3.9, HDX110 EQ-G, Unfiltered EOS 500D, ST80, SSAG

Acquisition: Astro Photography Tool, PHD Guiding

Processing: PixInsight

Addition of 49 images (49x300s, ISO800, f/3.9)

FoV : 1°15'x49'

Nell'emisfero boreale i mesi di fine inverno e primaverili sono la stagione delle galassie per noi astrofili.

Purtroppo però è anche il periodo di maggiore instabilità meteorologica, e proprio quest'anno nei mesi tra febbraio e aprile il cielo è stato spesso coperto o molto nuvoloso durante la notte.

Quando la situazione meteo è migliorata mi sono dedicato ai gruppi di galassie e in questo caso alla galassia "M106", conosciuta anche con la sigla "NGC 4258", e dintorni. Infatti nel campo inquadrato si trovano molte altre galassie tra le quali "NGC 4217", "NGC 4220", "NGC 4248", "NGC 4231" e "NGC 4232".

Per cercare di contrastare l'Inquinamento luminoso (Bortle 5-6) ho utilizzato il filtro Astronomik CLS, che non m ha aiutato molto a causa dell'illuminazione a LED. Quindi le 13h di integrazione non sono bastate per gestire bene soprattutto il background, che per essere accettabile mi ha costretto a scurirlo oltremodo. Ho fatto del mio meglio con gli strumenti a disposizione raggiungendo un discreto risultato

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In the Northern Hemisphere, the late winter and spring months are the galaxy season for us amateur astronomers.

Unfortunately, however, it is also the period of greatest meteorological instability, and this year in the months between February and April the sky was often overcast or very cloudy during the night.

When the weather situation improved I dedicated myself to galaxy groups and in this case to the galaxy "M106", also known by the acronym "NGC 4258", and its surroundings. In fact, in the field of view there are many other galaxies including "NGC 4217", "NGC 4220", "NGC 4248", "NGC 4231" and "NGC 4232".

To try to counteract light pollution (Bortle 5-6) I used the Astronomik CLS filter, which did not help me much due to the LED lighting. So the 13 hours of integration were not enough to manage well especially the background, which to be acceptable forced me to darken it excessively. I did my best with the tools available achieving a decent result.

by Google translator

Optic: APO Refractor Askar 103APO + 0.6X

Camera: ZWO ASI533MC-Pro

Mount: Sky Watcher HEQ5 Synscan

Seeing: 4-5 (scala Antoniadi)

Filter: Astronomik CLS+ SVbony UV-IR cut

-262x180s 250gain /23 dark /21 flat / 18 darkflat /80 bias (CLS)

t° sensor: -10°C

Date: 30/04/2025, 1-2-3/05/2025

Integration: 13h 6min

Temperature: 12°C (media)

location for : Biancavilla -Catania-(Italy) 515m slm (Bortle 5-6)

Acquisition: NINA, PHDGuiding

Processing: DSS, SIRIL, PS, GraXpert.

Stellar magnitude > 20th (GAIA-DR3).

This region is located in the constellation Orion. The bright star that is center left in the picture is Alnitak, the bottom star in the Belt of Orion.

22 x 10mins, @ISO 1600

20 Darks, Dark Flats, Flats, Bias( Median Combined )

Stacked in DSS, Final Adjustments in PS2

Canon 350XT modified, w/ Astronomik 13na Ha Filter

W.O. Zenithstar 105mm, @ f/7

Guided Using PHDguide/ Orion SS Autoguider / Orion ST 80mmm / Losmandy GM-8 Mount

Auto guided barn door tracker showing RA and Dec axis

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Date: 3 July 2011

Location: Mt Pinos, CA (34°48'48" N 119°07'35" W 2545 m)

Exposure: 7x5 minutes @ ISO 1600

Telescope: Takahashi FSQ 106ED @ f/3.65

Camera: Canon 50DH (IDAS UV/IR filter)

Guider: Starfish camera on a William Optics ZenithStar 80 ED and PhD Guiding software

Comments: Comprised of NGC6960, NGC6974, NGC6979, NGC6992, NGC6995, and IC1340.

About the Nebula:

The Elephant's Trunk Nebula is a concentration of interstellar gas and dust with-in the much larger ionized gas region IC 1396 (located in the constellation Cepheus), about 2,400 light-years away from Earth.

Reprocessing old data:

I don't often do this, but decided to reprocess old data from 2017 in the SHO Palette (SII, Hα & OIII). IC 1396 was imaged on my first "budget friendly" Telescope (a 6" GSO Newtonian Astrograph). This was one of my first attempts at Narrowband Astrophotography, and the data that I captured back then was less than ideal, but a nice challenge to process. It is all part of the never ending lifelong learning experience.

I would like to revisit the IC 1396 region again, and image the very interesting surrounding structure with my wide-field APO Refractor Telescope. It is interesting to look back and see what you've learnt (which is why I've always kept my old learning images as a record).

Wavelengths of the Electromagnetic Spectrum of Light:

Hydrogen-Alpha (656.3nm)

Oxygen-III (500.7nm)

Sulfur-II (672.4nm)

Astrometry Info:

Center RA, Dec: 323.737, 57.633

Center RA, hms: 21h 34m 56.951s

Center Dec, dms: +57° 37' 59.617"

Size: 46.8 x 60.6 arcmin

Radius: 0.638 deg

Pixel scale: 2.02 arcsec/pixel

Orientation: Up is 269 degrees E of N

View an Annotated Sky Chart of this image.

View this image in the WorldWideTelescope.

Processing:

Pre-Processing and Linear workflow in PixInsight, and finished in Photoshop (Starnet++ was also handy).

Martin

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Original image:

www.flickr.com/photos/martin_heigan/50477763043

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IMG_0828

November 1, 2008

Cropped Image

Edge on unbarred spiral galaxy

30 Million light years away in Andromeda

First attempt at this target.

EDIT: Wow... I caught NGC 898 too!

1 Hour 18 Minutes total

39x2 minutes. ISO 800

St. Louis, MO

Canon XSi DSLR

Orion 80ED (Imaging)

Orion Atlas

Orion 8 OTA (Guiding/PHD)

Date: 20 September 2009

Location: Mt Pinos, CA (34°48'48" N 119°07'35" W 2545 m)

Exposure: 8x5 minutes @ ISO 1600

Telescope: Takahashi FSQ 106ED @ f/5

Camera: Canon 50DH (IDAS UV/IR filter)

Guider: Starfish camera on a William Optics ZenithStar 80 ED and PhD Guiding software

Made this setup to measure stability of optical system between SCT and guide scope.

Guide scope focuser was improved 4/4/11.

I like this new arrangement, as plate can be switched between Springfield and CGEM mounts quickly.

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Clouds cut testing short till next week, Capella shot was only one made.

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Autoguiding will be added to SCT's normal Springfield mount soon www.flickr.com/photos/edhiker/sets/72157624186145557/

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IMG_1331SCr

They said it was SIMPLE - it was to to get this far in ten minutes.

1- download, install PHD program.

2- attach a non-discript USB webcam to computer (cost $10 at fair)

3- got lucky in selecting camera in PHD menu.

See next steps in next three photos.

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Can't wait to try on scope and stars.

I see a possible problem with exposure times, but happy for now.

Camera is Centrix / NetFlex Cam - "8 M pixel - 3200x2400"

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Screen10-01_599Cr

Date: 9 September 2007

Location: Mt Pinos, CA (34°48'48" N 119°07'35" W 2545 m)

Exposure: 4x10 minutes @ ISO 1600

Telescope: ZenithStar 105 ED @ f/5.6

Camera: Canon 20Da

Guider: Starfish camera on a William Optics ZenithStar 80 ED and PhD Guiding software

Comments: Next time I need to use my FSQ 106ED at f/3.65 to get more of the nebula.

The galaxy M33 is found in the constellation Triangulum. It is 3.0 million lightyears away from the Planet Earth. It can be viewed with binoculars from a darksky site as a "Fuzzy Gray Patch".

16 x 10mins, @ISO 1600

20 Darks, Dark Flats, Flats, Bias

Stacked in DSS, Final Adjustments in PS2

Canon 350XT modified, w/ Astronomik CLS Filter

W.O. Zenithstar 105mm, @ f/7

Guided Using PHDguide/ Orion SS Autoguider / Orion ST 80mmm / Losmandy GM-8 Mount

Date: 3 August 2008

Location: Mt Pinos, CA (34°48'48" N 119°07'35" W 2545 m)

Exposure: 8x5 minutes @ ISO 1600

Telescope: Celestron C14 @ f/11

Camera: Canon 20Da

Guider: Starfish camera on a William Optics ZenithStar 80 ED and PhD Guiding software