Newton SkyWatcher 200/1000

Monture EQ6-r pro

Canon 1000D défiltré partiel

Correcteur de coma Baader MPCC Mk III

Autoguidage OAG + ZWO ASI 290mm mini

ASIAIR Pro

51*300" => 4h15'

48*300" => 4h00

Total 8h15'

Traitement PixInsight + Photoshop CC

The Great Nebula in Orion (M42) and the Running Man Nebula (NGC 1977), photographed in Narrowband using the Hubble Palette (HST).

M42 is a diffuse nebula situated in the Milky Way, south of Orion's Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 light-years, and is the closest region of massive star formation to Earth.

Why image in Narrowband?

In short, different elements show up in different colors of the spectra in far more detail. See my link to ''A brief description of the Electromagnetic Spectrum of Light'' for more info.

Why go through all the trouble?

“That's the way to learn the most, that when you are doing something with such enjoyment that you don’t notice that the time passes.” - Albert Einstein.

Narrowband wavelengths of the light spectra in this image:

The Hubble Palette (HST)

Hydrogen-Alpha - 656.3nm

Oxygen-III - 500.7nm

Sulfur-II - 672.4nm

RGB Channel Mapping Ratio:

Red: 40% Ha + 60% SII

Green: 40% OIII + 30% Ha + 30% SII

Blue: 100% OIII

PixInsight PixelMath Formula Expression:

R/K: 0.4*Ha + 0.6*SII

G: 0.4*OIII + 0.3*Ha + 0.3*SII

B: OIII

Processing:

Pre-Processing and Linear workflow in PixInsight. PixelMath and Nebula Structure enhancement via Wavelets. Finished in Photoshop.

"Capturing Data is Science, but Processing it is Art".

Astrometry Info:

Annotated Sky Chart for this image.

RA, Dec center: 83.7624970537, -5.30247840247 degrees

Orientation: 1.2575903817 deg E of N

Pixel scale: 5.79732928062 arcsec/pixel

View this image in World Wide Telescope.

Hubble Palette explanation:

www.astronomymark.com/hubble_palette.htm

Narrowband explanation:

www.swagastro.com/narrowband-information.html

My brief description of the Electromagnetic Spectrum of Light:

www.flickr.com/photos/martin_heigan/22278042895

Martin

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Taken with a TMB92L, Hutech-modified Canon T3i DSLR, Orion SSAG autoguider and 50mm guidescope, and Celestron AVX mount. Consists of 42 240-second light frames and 45 240-second dark frames, all at ISO 800, as well as 60 flat and 100 bias frames. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop.

Gear used:

Canon 6D, Canon 400mm f5.6 and Skywatcher Star Adventurer

Software used:

Stacked in DeepSkyTracker, processed in PixInSight and Adobe Photoshop CC

60 x 1 min @ ISO 1600 lights

30 flats/darks/bias

My very first session of imaging deep space objects with an equatorial mount. How did i do?

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七姊妹至加洲星雲一帶

幸運在山上遇上好天氣，共 3 小時曝光也能夠拍攝到比較明顯的雲氣結構，確實有點喜出望外。

相片右邊有大家都很熟悉的七姊妹星團 (M45)，離我們約四百多光年；中央是英仙座分子雲結構，其中有比較年輕的造星區 IC348 和 NGC1333，離我們約六百至八百光年；左邊是加洲星雲 (NGC1499)，因被旁邊的熾熱恆星卷舌三照射電離而發出迷人的紅色，離我們約一千光年。利用 50mm 鏡頭配合 APS-C 相機，剛好將

三者收納到相片之中。

Photo by - Michael Leung

日期：2015/10/17 @ 梅州陰那山

相機：Canon EOS 650D mod.

鏡頭：Nikkor 50mm/1.8 AIS @ f/2.8

追星儀：Kenko Skymemo RS

設定：ISO 800, 240sec x 46 (Darkframe / Bias)

香港拍攝難度：★★★ (五星最難)

建議鏡頭焦距：35 ~ 100mm

適合拍攝月份：9 月 ~ 12 月 (香港)

La nébuleuse de l'Iris (NGC 7023) dans la constellation de Céphée est un bel exemple de nébuleuse par réflexion.

Un vaste nuage de poussière est mis en lumière par la réflexion d'une étoile brillante en son centre.

Prise le 24 26 et 28/05/2020 sur trois nuits

Newton SW 200/1000

EQ6-r pro

Canon 1000D défiltré partiel

28*180" + 295*90" = Total 8h46'

Poses de 180s autoguidées par OAG + T7m (ASI 120mm)

ISO 800

DOF 50-100-20

Traitement Pixinsight + Photoshop CC

Nébuleuse de l'Iris - NGC7023

NGC 7380 - The Wizard Nebula

/

I appear to have figured out how to edit the stars a bit better. Or at least reduce their all invading presence.

/

Still more to do , but this is great for now. Pretty much one year since I got my "starter" kit from @firstlightoptics Aka, I could have bought a nice new bike.

/

132*180s images

Askar 71f at 490mm

ZWO ASI533MC

Optolong eNhance filter

/

#astropho #astrophotography_ #astrophotography #astrophotographer #deepskyimaging #deepskyobject

/

@bbcskyatnightmag

This is a two panel mosaic of the remains of a supernova that occured in the constellation Cygnus. The full complex of the Veil Nebula is significantly larger than this, but this could serve as the beginning of a mosaic to get the full web of dust and energized gas.

Each panel is a stack of 5 min exposures with an Edge HD 925 at f/2.3 with Hyperstar and an Atik 314L+ one-shot color CCD camera. Images were preprocessed in Nebulosity, then registered and stacked in PixInsight. PixInsight was also used to assemeble the mosaic and for further processing. Final touches in PS CS 5.1.

This is roughly centered on the star 52 Cygni (bright star at center), whose coordinates are:

RA 20h 45m 39.8s

DEC +30° 43' 11"

North is at the left, and west is at the top.

Taken on 9 June 2013. This is a 2-panel mosaic using Nikon d7000, Nikkor 85mm f/1.4mm lens with AstroTrak drive.

Acquired near Santa Fe, NM @ 6700' elevation.

NGC-7000

So langsam bekomme ich den Dreh raus...

65 Lights

20 Darks

40 Bias

Astro Pixel Processor + PS

First attempt of NGC-7000 Nebula

Working on the assumption that I'm unlikely to add to this in 2012, these are my efforts for the last 12 months :)

2012 was not a good year weather wise, even by UK standards. I struggled to find 12 images to go in this, but that could be down to the fact that I tend to spend more time on each image these days. Anyway, thanks for all your kind comments and faves over the last year, and I wish you all a peaceful Christmas, and a multitude of clear skies in 2013 :)

The Namibian sky is something special and certainly something that we cannot get enough of ... Taken with our equipment at the Hakos Astro Farm, this image of the Lagoon, Trifid, and surrounding nebulosity, probably represents the best we have yet achieved from Ines' TS94EDPH (f/4.4). Taken over four nights from our most recent trip, Ines insisted that the last night be used to collect an extra portion of OIII - this has really made a difference to the final result. Wisps and strands of OIII are visible going out from RCW 146 towards Sh2-34, even Sh2-32 seems to have a light OIII halo. However, it is the "sheer intensity" of the radiation from the center of the Lagoon, which the (additional) OIII data is able to portrait ...

In collaboration: Ines Mondon-Ford

La nébuleuse du voile est une partie des "dentelles du cygne", un rémanent de supernova ayant explosé il y a 10 à 20.000 ans.

Il s'agit de fins filaments de gaz en cours se dispersant lentement dans l'espace.

Photo prise sur deux nuits les 03 et 14/09/2020

Newton SkyWatcher 200/1000

Monture EQ6-r pro

Canon 1000D défiltré partiel

Correcteur de coma Baader MPCC Mk III

Autoguidage OAG + ZWO ASI 290mm mini

ASIAIR Pro

Traitement Pixinsight + Photoshop CC

Ha : 84x300s : 7h00

Couleur : 73x300s : 6h05'

Total : 13h05'

Another collaboration with my northern buddy, Dave Williams, who once again kindly provided the Ha, which was used as luminance. I also layered in the M42 I did earlier this year to improve the colour. This again demonstrates just how much the ED80 leaves the 200p in its wake :)

RGB :

SW ED80/EQ5

Nikon D70 modded, Baader Neodymium filter

31 x 240secs iso 800, 30 x 8 secs iso 800 for the core (2 hours 8 minutes)

Guiding (RA only): Quickcam Pro4000/9x50 finderscope, PHD

Stacked in DSS and processed in CS5

Ha (Dave Williams):

10 x 600 secs (I hour 40 minutes)

250mm Hasselblad lens at f4

Moravian G2 8300

5nm filter

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除了M31仙女座星系外，鄰近的M33三角座星系也是不少天文愛好者的拍攝目標。 三角座星系在本星系群中是第三大的星系，比鄰近的仙女座星系和我們的銀河系略小一些，並可能受到仙女座星系(M31)的重力約束，但在宇宙中仍可算是一個大的螺旋星系。

Photo by Timmy Wong

相機：STL11000M

鏡頭：Takahashi FSQ106N

追星儀：Skywatcher NEQ6 (+EQMOD)

設定：L: 900s x 6, R: 900s x 3, G: 900s x 3, B: 900s x 3, Ha: 1800s x 2

Les Pléiades, ou amas M45, sont un amas ouvert d'étoiles dans la constellation du Taureau.

L'amas s'étend sur 2°, soit l'équivalent de quatre fois le diamètre apparent de la Lune.

L'origine du nom « Pléiades » provient de la mythologie grecque : les Pléiades sont sept sœurs, filles d'Atlas et de Pléioné : Astérope, Mérope, Électre, Maïa, Taygète, Célaéno et Alcyone.

Newton SkyWatcher 200/1000

Monture EQ6-r pro

Canon 1000D défiltré partiel

Correcteur de coma Baader MPCC Mk III

Autoguidage OAG + ZWO ASI 290mm mini

ZWO EAF

ASIAIR Pro

Traitement PixInsight + Photoshop CC

Mosaïque de deux panneaux :

Panneau 1 :

Prise le 10/10/2020 :

27*300" => 2h15'

Panneau 2

Prise le 08/11/2020

34*300" => 2h50'

TOTAL : 5h05'

La nébuleuse d'Orion (M42 ou NGC 1976), est une nébuleuse diffuse qui brille en émission et en réflexion au cœur de la constellation du même nom.

C'est la nébuleuse la plus intense visible à l'œil nu depuis l'hémisphère nord.

A gauche, la nébuleuse par réflexion NGC 1977 dite du "running man"

Photo prise le 19/11/2019

Newton SW 200/1000 sur N-EQ5

Canon 1000D défiltré partiel

Correcteur Baader MPCC MkIII

ISO 1600

221x30" => 1h50'

DOF 60-50-15

Traitement Siril + PS

Yet another collaboration between Dave Williams (Ha) and myself (RGB). After a month without a single usable clear sky, we finally got one, so I quickly read all the user manuals for my kit again and got out there. Freezing cold, but I suffered in silence (as there was no-one else there) and soldiered on. Managed 2 hours of 3 minute subs and combined Dave's Ha as luminance, as before.

I may add more RGB as and when the opportunity arises (hopefully this side of Christmas) but for the time being I'm quite pleased with this effort.

RGB (Me) :

SW ED80/EQ5

Nikon D70 modded, Baader Neodymium filter

39 x 180secs iso 800 (1 hour 57 minutes)

Guiding (RA only): Quickcam Pro4000/9x50 finderscope, PHD

Ha (Dave Williams):

10 x 600 secs (I hour 40 minutes)

Nikon 180mm lens @ f2.8 (heavily cropped)

Moravian G2 8300

Astrodon 5nm Ha filter

Stacked in DSS and processed in CS5

Nome: Galáxias Antenas - NGC 4038 e NGC 4039

Tipo: Galáxias espirais barradas (SBm) [1]

Distância: ~68.000.000 anos-luz [2]

Magnitude (filtro V): 10,20 [1]

Constelação: Corvo (Corvus)

Esta imagem mostra a colisão das duas Galáxias Antenas. Durante o curso da colisão, bilhões de estrelas serão formadas. As regiões mais brilhantes e compactas desses berçários estelares são chamadas de superaglomerados de estrelas.[3]

As duas galáxias espirais começaram a interagir há algumas centenas de milhões de anos atrás, tornando as galáxias das Antenas um dos exemplos mais próximos e mais jovens de um par de galáxias em colisão. As manchas alaranjadas à esquerda e à direita no centro da galáxia são os dois núcleos das galáxias originais e consistem principalmente em estrelas antigas entrecruzadas por filamentos de poeira, que possuem tonalidades marrons na imagem. As regiões azuladas são formações de estrelas cercadas por gás hidrogênio brilhante, aparecendo na imagem em rosa e vermelho.[3]

Com a idade que data os aglomerados na imagem, os astrônomos descobrem que apenas 10% dos superaglomerados de estrelas recém-formados nas Antenas sobreviverão além dos primeiros 10 milhões de anos. A grande maioria dos superaglomerados de estrelas formados durante essa interação se dispersará, com as estrelas individuais se tornando parte do plano de fundo suave da galáxia. No entanto, acredita-se que cerca de cem dos aglomerados mais maciços sobreviverão para formar aglomerados globulares regulares, semelhantes aos aglomerados globulares encontrados em nossa própria galáxia da Via Láctea. As Galáxias Antenas recebem esse nome por causa dos longos "braços" parecidos com antenas que se estendem para longe dos núcleos das duas galáxias, mais bem vistos pelos telescópios terrestres. Essas "caudas de maré" foram formadas durante o encontro inicial das galáxias cerca de 200 a 300 milhões de anos atrás. Eles nos dão uma prévia do que pode acontecer quando nossa galáxia Via Láctea colidir com a vizinha Andrômeda em vários bilhões de anos.[3]

Fonte:

[1] - HyperLeda - Database for physics of galaxies - leda.univ-lyon1.fr/ledacat.cgi?o=ngc6744

[2] - The Tip of the Red Giant Branch Distances to Type Ia Supernova Host Galaxies. III. NGC 4038/39 and NGC 5584, Jang, In Sung; Lee, Myung Gyoon - The Astrophysical Journal

[3] - Nasa - www.nasa.gov/multimedia/imagegallery/image_feature_1086.html

Esta imagem foi registrada durante os dias 07, 08 e 20 de junho de 2019 na zona rural de Munhoz - Minas Gerais - Brasil. Local com escala de Bortle 4.

Dados técnicos:

Gain 139, offset 10, Bin 1x1, temperatura da câmera -20°C, exposição total de 7h01m (129 subs), darks (40), flats (180) e darks flats (80) aplicados.

Filtros:

H-Alpha 17 x 300s

Luminância (IR/UV Cut) 60 x 180s

Vermelho 21 x 180s

Verde 17 x 180s

Azul 14 x 180s

Equipamento:

- Montagem Equatorial Orion Atlas EQ-G

- Telescópio GSO Ritchey-Chretien 8" F8 Fibra de Carbono

- Câmera ZWO ASI1600MM Cooled

- Redutor focal Astro-Physics 67 CCDT

- Auto guiagem com câmera ZWO ASI120MM em OAG

- Roda de Filtros ZWO 8 posições

- Filtros Optolong 1,25" H-Alpha 7nm, Luminance, Red, Green, Blue

Softwares

- Captura: APT - Astro Photography Tool 3.50

- Processamento: PixInsight 1.8 e Adobe Photoshop CS5

- Guiagem: PHD2

- Controle: EQMOD e SkyTechX

Name: Antennae Galaxies - NGC 4038 e NGC 4039

Type: Spiral barred galaxies (SBm) [1]

Distance: ~68.000.000 light-years [2]

Magnitude (filtro V): 10,20 [1]

Constellation: Corvus

This image shows a merging pair of galaxies. During the course of the collision, billions of stars will be formed. The brightest and most compact of these star birth regions are called super star clusters.[3]

The two spiral galaxies started to interact a few hundred million years ago, making the Antennae galaxies one of the nearest and youngest examples of a pair of colliding galaxies. The orange blobs to the left and right of image center are the two cores of the original galaxies and consist mainly of old stars criss-crossed by filaments of dust, which appears brown in the image. The two galaxies are dotted with brilliant blue star-forming regions surrounded by glowing hydrogen gas, appearing in the image in pink and red.[3]

By age dating the clusters in the image, astronomers find that only about 10 percent of the newly formed super star clusters in the Antennae will survive beyond the first 10 million years. The vast majority of the super star clusters formed during this interaction will disperse, with the individual stars becoming part of the smooth background of the galaxy. It is however believed that about a hundred of the most massive clusters will survive to form regular globular clusters, similar to the globular clusters found in our own Milky Way galaxy. The Antennae galaxies take their name from the long antenna-like "arms" extending far out from the nuclei of the two galaxies, best seen by ground-based telescopes. These "tidal tails" were formed during the initial encounter of the galaxies some 200 to 300 million years ago. They give us a preview of what may happen when our Milky Way galaxy collides with the neighboring Andromeda galaxy in several billion years.[3]

Source:

[1] - HyperLeda - Database for physics of galaxies - leda.univ-lyon1.fr/ledacat.cgi?o=ngc6744

[2] - The Tip of the Red Giant Branch Distances to Type Ia Supernova Host Galaxies. III. NGC 4038/39 and NGC 5584, Jang, In Sung; Lee, Myung Gyoon - The Astrophysical Journal

[3] - Nasa - www.nasa.gov/multimedia/imagegallery/image_feature_1086.html

This image was captured at days 7th, 8th and 20th June 2019 in rural zone of Munhoz - Minas Gerais - Brazil. Bortle Scale 4.

Technical data:

Gain 139, offset 10, Bin 1x1, sensor's temperature -20°C, total exposition of de 7h01m (129 subs), darks (40), flats (180) and darks flats (80) applied.

Filters:

H-Alpha 17 x 300s

Luminance (IR/UV Cut) 60 x 180s

Red 21 x 180s

Green 17 x 180s

Blue 14 x 180s

Equipments:

- Equatorial Mount Orion Atlas EQ-G

- GSO Ritchey-Chretien Telescope 8" F8 Carbon Fiber

- ZWO ASI1600MM Cooled

- Focal reducer Astro-Physics 67 CCDT

- Guided with ZWO ASI120MM using OAG

- ZWO Filter Wheel (8 x 1.25")

- Filter Optolong 1.25" H-Alpha 7nm

- Filter Optolong 1.25" Luminance

- Filter Optolong 1,25" Red

- Filter Optolong 1,25" Green

- Filter Optolong 1,25" Blue

Softwares

- Capture: APT - Astro Photography Tool 3.50

- Processing: PixInsight 1.8 and Adobe Photoshop CS5

- Guiding: PHD2

- Control: EQMOD and SkyTechX

A widefield view of the faint light of the Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105).

The Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive Wolf-Rayet star (WR 136). The star is in its Red Giant phase and shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun's mass every 10,000 years.

Gear:

GSO 6" f/4 Imaging Newtonian Reflector Telescope.

Baader Mark-III MPCC Coma Corrector.

Astronomik CLS Light Pollution Filter.

Celestron SkySync GPS Accessory.

Orion Mini 50mm Guide Scope.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

Canon 60Da DSLR.

Tech:

Guiding in Open PHD 2.6.2.

Image acquisition in Sequence Generator Pro.

Lights/Subs:

16 x 180 sec. ISO 6400 CFA FIT Files.

Calibration Frames:

50 x Bias (at each ISO)

33 x Darks (at each ISO)

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry Info:

RA, Dec center: 303.087335155, 38.4677976342 degrees

Orientation: 0.916484844626 deg E of N

Pixel scale: 4.28992389772 arcsec/pixel

nova.astrometry.net/user_images/1286379#annotated

Martin

-

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

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The Pleiades also known as the "Seven Sisters" open star cluster shines brightly in the sky over Sigel, PA as the California Nebula is faintly visible.

Veil Nebula in Cygnus, part of the supernova remnant called The Cygnus Loop. Captured through a Ha and OIII filters using my 350D dslr and ED80 :) i bodged the first process trying to stretch too much detail from the data which wasnt really there, much happier with this process, more natural and cleaner looking.

One of my fist short exposure learning/test Astro-images, photographed close to the city.

The Lagoon Nebula (M8, Messier 8 or NGC 6523) is 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.

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.

Photographed rather close to the "light polluted" suburbs of the West Rand and North Rand of Johannesburg (Gauteng Province, South Africa). Light Pollution Map .

Astrometry info::

RA, Dec center: 271.058268626, -24.3623113276 degrees

Orientation: 0.715439826321 deg E of N

Pixel scale: 4.18683362403 arcsec/pixel

nova.astrometry.net/user_images/774837#annotated

Gear:

GSO 6" f/4 Imaging Newtonian Telescope (Astrograph).

Celestron Advanced VX Equatorial Mount.

Orion UltraBlock Narrowband Light Pollution Filter.

Canon 60Da DSLR (sensitive to IR light at 656.28 nm).

Processed in PixInsight.

Polar Aligned, but Unguided.

Stacked 20 sec. exposures (Lights/Subs).

Calibration Frames: Darks and Bias frames (no Flats).

Martin

-

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

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

Crescent nebula is an ionized gas nebula about 5000 light years from Earth.

⏱️ 6h (93 x 4min ISO 800 frames)

Kaunas, Lithuania (Bortle 8 skies)

📅 September, 2021

Setup:

📷 Canon EOSR unmodified

🔭 Skywatcher Explorer 150PDS

️ Baader MPCC and IDAS LPS-D2 filter

⚙️ Skywatcher HEQ5 Pro

↖️ Guiding with ZWO ASI 120MM Mini + ZWO 30mm Mini Guide Scope + PHD2

💻 Stacked and edited with DeepSkyStacker and PixInsight

Following comments made by Jean Jacquinot on my last iteration of this thing, a committee meeting was convened, and the man from the frozen north agreed that some detail had been lost. It was decided that a reprocess was in order, and this has now been actioned. Above is the result :)

Does Flickr sharpen images when you upload them? It certainly seems to. Anyway, a full reprocess, colour tweaked in places, etc. etc. Better I think. Thanks to Jean for pointing out my previous oversight :)

Last iteration here, for comparison.

I now regard the horsey in the same light as Andromeda, so I'll say goodbye to it until next year :)

RGB (Moi):

SW ED80/EQ5

Nikon D70 modded, Baader Neodymium filter

45 x 180secs iso 800, 60 x 180secs iso 640 (5 hours 15 minutes)

Guiding (RA only): Quickcam Pro4000/9x50 finderscope, PHD

Stacked in DSS and processed in CS5

Ha (Dave Williams):

15 x 600secs (2 hours 30 minutes)

Used Hasselblad 250mm f4 lens at f4 (cropped - quite a bit!)

Moravian G2 8300

Astrodon 5nm Ha filter

Takahashi EM200 mount

Guiding: DMK through an old 100mm M42 lens

M109 (NGC 3992) est une galaxie spirale barrée située dans la constellation de la Grande Ourse à environ 48 millions d'années-lumière.

On distingue également trois de ses galaxies satellites, plus petites : UGC 6923, UGC 6940 et UGC 6969.

Le rayon lumineux à droite de la galaxie est issu de l'étoile Gamma de la grande ourse, très brillante et très proche.

Newton SkyWatcher 200/1000

Monture EQ6-r pro

Canon 1000D défiltré partiel

Correcteur de coma Baader MPCC Mk III

Autoguidage OAG + ZWO ASI 290mm mini

ZWO EAF

ASIAIR Pro

Traitement PixInsight + Photoshop CC

Prise le 03/02/2021 :

57*300" => 4h45'

ISO 800

DOF

M38 (ou NGC 1912) est un amas ouvert situé dans la constellation du Cocher.

Il est accompagné du plus petit amas NGC 1907

Prise le 22/11/2020

Newton SkyWatcher 200/1000

Monture EQ6-r pro

Canon 1000D défiltré partiel

Correcteur de coma Baader MPCC Mk III

Autoguidage OAG + ZWO ASI 290mm mini

ZWO EAF

ASIAIR Pro

Traitement Pixinsight + Photoshop CC

40*300" => 3h20'

ISO 800

La Comète C/2020 F3 Neowise de passage au dessus des alignements de Carnac.

Canon 1300D stock

Canon 50mm f/1.8 à f/4

ISO 800

43*15s

4 frames pour l'avant plan

Omegon Lx2

Traitement Sequator Lightroom et Photoshop CC

Right, I'm officially sick to death of Andromeda! This is now 16 hours of varying sub-lengths and ISO settings, and I've reached the point where my skies are going to yield no more. Quite depressing to think that 16 hours here produces the same result as perhaps an hour under dark skies - so this is my final attempt ;) (Wrong!). Better processing than the last shocking effort I think - a little more subtle, and some fainter detail evident (and some detail less evident as the contrast has been turned down a bit!)

Having spent a fortnight thinking about very little else, I can now get on with my life :)

SW ED80/EQ5

Nikon D70 modded, Baader Neodymium filter

16 hours of 4 - 12 minute subs @ ISO 640 - 1600

Guiding: Quickcam Pro4000/9x50 finderscope, PHD

Stacked in DSS and processed in CS5

Yet another clear night - whatever next?! :)

I did another 4 hours on M33 last night, only to discover at the end that the dew band wasn't working - 4 hours wasted, more or less. Not to be deterred, and with Orion waving at me invitingly, I had a go at good ol' long face. The ED80 works miracles on this, compared to the 200p :)

SW ED80/EQ5

Nikon D70 modded, Baader Neodymium filter

45 x 180secs iso 800 (2 hours 15 minutes)

Guiding (RA only): Quickcam Pro4000/9x50 finderscope, PHD

Stacked in DSS and processed in CS5

L(Ha)RGB Version

This is a comparison of the stacking with and without the images taken with the Optolong UHC filter. I did two sets of exposures, one with the filter in and one without, each set is ISO 400 and f2.5, 2x 4 minutes, 2x 2 minutes, and 2x 1 minute exposures. Stacked with Deep Sky Stacker and edited with PixInsight and Photoshop. Shot from a Bortle 4/5 zone at Rockport Reservoir, Utah.

The image on the left is the set without the Optolong stacked, the image on the right is with and without the filter stacked together. I tried to edit them as similar as possible.

Taken with a TMB92L, Canon T3i DSLR, and Celestron CG-4 mount. Consists of 38 light and 29 dark frames, each a 35-second exposure at ISO 800, stacked in DeepSkyStacker and processed in Photoshop.

Rio Rancho NM Bortle 5 zone -- from my balcony

October 17-20 2021

William Optics Redcat 51

ZWO 183mc pro

ZWO 30mm f/4 mini guide scope and ZWO 120 Mini

Optolong L-eNhance filter

ZWO ASI Air Pro

Sky-Watcher HEQ5

106 X 180s lights ; with darks bias dithering

Gain 111 at -10C

Processed in DSS and PS

Astrophotography Showcase

I created this short compilation of my Astrophotography for educational use, and for the Astrophotography talks and lectures at the ScopeX 2017 Astronomy & Telescope Expo.

Music by Symmetry.

View in full screen HD on Vimeo.

Also see my updated Astrophotography Showcase (early 2019).

Martin

-

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

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NGC 7635, ou nébuleuse de la Bulle, est une nébuleuse d'environ 10 années-lumière de diamètre située dans la constellation de Cassiopée.

Elle est formée par le vent stellaire créé par l'étoile SAO 20575 à une vitesse de plus de 1 700 km/s.

A gauche l'amas ouvert Messier 52

Newton SkyWatcher 200/1000

Monture EQ6-r pro

Canon 1000D défiltré partiel

Correcteur de coma Baader MPCC Mk III

Filtre Ha EOS Clip Astronmik 12 nm

Autoguidage OAG + ZWO ASI 290mm mini

ZWO EAF

ASIAIR Pro

Traitement Pixinsight + Photoshop CC

Mixage Ha-RHaVB

Ha le 28/11/2020 :

110*300" => 9h10'

ISO 800

Couleur le 08/12/2020

8*300" => 0h40'

ISO 800

TOTAL 09h50'

Prints, cards and more are available via the website: shiny.photo/photo/Lobster-Claw-and-Bubble-Nebulae-020c146...

For the first time I can remember, we had an entire week of consecutive clear nights. No option but to make the most of it. So despite it being low on the northern horizon, I pointed my smaller refractor telescope at a well-known part of Cassiopeia.

There's a lot happening in this region of space. All the rusty orange-red is Hydrogen-alpha emission nebulosity; the bright blue is Oxygen-III emission nebula. At the bottom is the well-known Lobster-Claw nebula (Sh2-157); upper left is the Bubble Nebula (Sh2-162 or NGC 7635) - a giant molecular cloud being excited and pushed away by its central star; toward the upper right is a small bright emission nebula NGC7538 in neighbouring Cepheus surrounded by the Ha haze of Sh2-161.

I accumulated a total integration of 19 hours using a mixture of Optolong L-eNhance and IDAS NBZ dual-narrowband filters for the nebulae and Neodymium for the stars (so the colours are very realistic). In the process, the image became not just about the obvious bright glowing bits but also about the subtle veins of dark nebulae running through the Bubble and the large Y-shaped expanse in the upper third.

Whilst exploring in great detail, I stumbled across a rather fuzzy looking star just above the centre of the image, left of the top "claw" - with some research, it transpires this is HH-170, the first time I've spotted a HerbigâHaro object (a tiny reflection nebula, jets of partially ionized gas interacting with more gas and dust surrounding newly formed stars).

It was sufficiently low on the northern horizon that I had to abandon shooting for an hour each night while the neighbours' house got out the way. Shooting at near-full moon through the thickest part of the atmosphere made for a lot of light pollution which took some work removing in post. I look forward to reshooting throughout the season.

Much of the work with stacking and extracting Ha and OIII channels and fixing the star shapes and colours happened in PixInsight, but the final combination was performed in Affinity Photo for a dynamic precise control of how far the OIII intersected overlapping the Ha signal, most notable in the Lobster Claw.

This is the Rho Ophiuchi region shot with my Nikon D7000 and Rokinon 85mm f1.4 lens on an iOptron Skytracker mount. This is the first image I've done with the Optolong UHC filter as well, which added a tremendous amount of signal to the red channel.

I did two sets of exposures, one with the filter in and one without, each set is ISO 400 and f2.5, 2x 4 minutes, 2x 2 minutes, and 2x 1 minute exposures. Stacked with Deep Sky Stacker and edited with PixInsight and Photoshop. Shot from a Bortle 4/5 zone at Rockport Reservoir, Utah.

Dans la constellation du cygne, NGC 7000 est l’une des plus vastes nébuleuses du ciel boréal : elle représente dans le ciel une surface équivalente à plus de 4 pleine Lune (quasiment 6° au total).

Newton SkyWatcher 200/1000

Monture EQ6-r pro

ZWO ASI2600 MC pro

Correcteur de coma Baader MPCC Mk III

ZWO OAG + ZWO ASI 290mm mini

ZWO EAF

ASIAIR Pro

Filtre Optolong l-eXtreme 2"

Traitement PixInsight + Photoshop CC

Montage HOO

Acquisition sur trois nuits, les 7 8 et 09/06/2021

TOTAL : 107*300" => 8h55'

Taken with a TMB92L, Canon T3i DSLR, Orion SSAG autoguider and 50mm guidescope, and Celestron AVX mount. Consists of 35 120-second light frames and 35 120-second dark frames, all at ISO 800, as well as 20 flat and 50 bias frames. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop.

Total exposure : 40 min

Nikon 5600

Nikkor 50 mm f1.8 @f2.8

Ioptron skyguider pro

Location : Kerala,India

18x180s SII

14x180s Hα

4x180s OIII

100xBias

50xFlats per channel

50xDark Flats per channel

100xDarks

Processed in Pixinsight

SkyWatcher Evostar 80ED + 0.85xFF, ZWO ASI1600mm Pro, 7mm ZWO Narrowband filters, captured with N.I.N.A.

M22 (NGC 6656) is a rich globular cluster that is visible in the dense star fields of Sagittarius. If you took pictures of it throughout the night, you could look for RR Lyrae variables to measure the distance to it. This is the method Harlow Shapley used -- based on Henrietta Leavitt's period-luminosity analysis -- to measure the size of the Milky Way Galaxy and our position within it. The bright star at the lower right is 24 Sgr.

From 16 90s exposures preprocessed in Nebulosity, stacked and initially processed in PixInsight, with final touches in PS CS 5.1. Taken with a Celestron Edge HD at f/2.3 with Hyperstar and an Atik 314L+ color CCD.

Image center (J2000) is at

RA 18h 35m 31s

DEC -23° 52' 32"

Taken with a Sigma AF 70-300mm f/4-5.6 APO DG at 200mm and f/6.3, Canon T3i DSLR, and Celestron Advanced VX mount. Consists of 100 light and 43 dark frames, each a 60-second exposure at ISO 3200. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop.

Es|

Las nebulosas son tan famosas quizá porque se identifican con formas familiares, al igual que los gatos lo son quizá porque se meten en problemas. Sin embargo, no se conoce ningún gato que pudiera crear la enorme nebulosa Pata de Gato visible en Scorpius. La Pata de Gato se encuentra a 5.500 años luz de distancia y es una nebulosa de emisión con un color rojo que proviene de la gran abundancia de átomos de hidrógeno ionizado. Conocida también como la nebulosa Zarpa de Oso o NGC 6334, contiene estrellas de casi diez veces la masa del Sol que han nacido en este lugar durante los últimos millones de años.

La imagen es una fotografía de campo profundo de la nebulosa Pata de Gato, fue capturada en los oscuros cielos del Cajon del Maipo el pasado 12/05/2019.

Exif: Canon T5i

Iso 1600

30 frames x 180s

Capturada con Telescopio

Celestron Vx 9.25.

Apilada con Sequator

Procesada con Adobe Lightroom

y Photoshop.

Autor: Diego Tapia | Manuel Tobar

Not my favourite subject, but not a lot up there at the moment, and we had a couple of clear nights :)

Five sessions between 1-29 April 2013 - total 10 hours 38 minutes. I don't think giving the total exposure is of much help to anyone really, as the result depends on so many factors, not least the quality of your skies (pretty low in my case). But it at least demonstrates how much effort has been expended :)

And the stars are almost round :)

SW ED80/EQ5

Nikon D70 modded, Baader Neodymium filter

159 subs, 3-6 mins, iso 800, total 10 hours 40 minutes

Guiding: Quickcam Pro4000/9x50 finderscope, PHD

Stacked in DSS (2 x drizzle) and processed in CS5.

One of my fist short exposure learning/test Astro-images (photographed close to the city).

A deep sky wide field astro-photo of Omega Centauri (NGC 5139), a globular cluster in the constellation of Centaurus. Located at a distance of 15,800 light-years, it is the largest globular cluster in the Milky Way Galaxy (at a diameter of roughly 150 light-years).

To give an indication of distance, light travels about 10 trillion kilometers or 6 trillion miles in a year. The Omega Centauri globular cluster is estimated to contain approximately 10 million stars and a total mass equivalent to 4 million solar masses (1 solar mass is equal to the mass of the Sun, weighing in at about 2 Nonillion kilograms).

Globular Clusters were described by Carl Sagan like a "swarm of bees". In this case it is 10 Million suns in a dense cluster.

Photographed rather close to the "light polluted" suburbs of the West Rand and North Rand of Johannesburg (Gauteng Province, South Africa). Light Pollution Map.

Astrometry info:

RA, Dec center: 201.667367509, -47.469712706 degrees

Orientation: 1.04623985658 deg E of N

Pixel scale: 6.1860599014 arcsec/pixel

Field contains: NGC 5139

nova.astrometry.net/user_images/774840#annotated

Gear:

GSO 6" f/4 Imaging Newtonian Telescope (Astrograph).

Celestron Advanced VX Equatorial Mount.

Orion UltraBlock Narrowband Light Pollution Filter.

Canon 60Da DSLR (sensitive to IR light at 656.28 nm).

Processed in PixInsight.

Polar Aligned, but Unguided.

Stacked 10 sec. exposures (Lights/Subs).

Calibration Frames: Darks and Bias frames (no Flats).

Martin

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

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

Messier 45 - Open Cluster M45, type ‘b’ in Taurus - Coordinates: RA 3h 47m 24s | Dec +24° 7′ 0″, Distance to earth: 444.2 light years, Radius: 17.5 light years, Magnitude 1.6, Constellation of Taurus, Color: hot blue. There are references to the Pleiades in the Odyssey, the Bible, and the Quran, and it is also revered in Hindu mythology. Mentioned by Homer about 750 B.C., by biblical Amos about 750 B.C., and by Hesiod about 700 B.C. The Pleiades, also known as Messier 45 (M45), are among those objects which are known since the earliest times. At least 6 member stars are visible to the naked eye. At the same time, under moderate conditions, this number increases to 9, and under clear dark skies jumps up to more than a dozen (Vehrenberg, in his Atlas of Deep Sky Splendors, mentions that in 1579, well before the invention of the telescope, astronomer Moestlin has correctly drawn 11 Pleiades stars, while Kepler quotes observations of up to 14).

The Pleiades also carry the name "Seven Sisters"; according to Greek mythology, the Pleiades are the seven daughters of the “father” Titan Atlas "mother" Oceanid Pleione: Alcyone, Asterope (a double star, also sometimes called Sterope), Electra, Maia, Merope, Taygeta and Celaeno. It was said that after Atlas was tasked to carry the heavens on his shoulders, the hunter Orion began to pursue the Pleiades. To protect them Zeus transformed them into doves, and then into constellations, to comfort their father. The constellation of Orion still pursues the Pleiades across the night sky. This pursuit is apparent in a timelapse video of these two objects.

In Japan, the Pleiades are called “Subaru", and the car company of the same name uses the Pleiades as their company logo.

The Persian name is "Soraya", after which the former Iranian empress was named. Old European (e.g., English and German) names indicate they were once compared to a "Hen with Chicks". Other cultures tell more and other lore of this naked-eye star cluster. Ancient Greek astronomers Eudoxus of Knidos (c. 403-350 BC) and Aratos of Soloi (c. 310-245 BC), in his Phainomaina (c. 270 BC), listed them as their own constellation: The Clusterers. Admiral Smyth also refers to this in his Bedford Catalog.

The Pleiades is one of the best-known star clusters in the entire sky. It is easily visible to the naked eye on Winter evenings from the Northern Hemisphere. Located in the constellation of Taurus, the Pleiades forms a tiny dipper-shaped asterism in the shoulder of the Bull.

The Pleiades nebulae are blue-colored, which indicates that they are reflection nebulae, reflecting the light of the bright stars situated near (or within) them. The brightest of these nebulae, that around Merope, was discovered on October 19, 1859, by Ernst Wilhelm Leberecht (Wilhelm) Tempel at Venice (Italy) with a 4-inch refractor; it is included in the NGC as NGC 1435. The nebulae around Alcyone, Electra, Celaeno and Taygeta were found in photographs in the later 1880s. The first Astro cameras revealed the full complexity of the Pleiades nebulae, e.g. by that of the brother's Henry in Paris and Isaac Roberts in England, between 1885 and 1888. In 1890, E.E. Barnard discovered a starlike concentration of nebulous matter very close to Merope, which found its way into the IC as IC 349. The analysis of the spectra of the Pleiades nebulae by Vesto M. Slipher in 1912 revealed their nature as reflection nebulae, as their spectra are exact copies of the spectra of the stars illuminating them.

Physically, the reflection nebula is probably part of the dust in a molecular cloud, unrelated to the Pleiades cluster, which happens to cross the cluster's way. It is not a remainder of the nebula from which the cluster once formed, as can be seen from the fact that the nebula and cluster have different radial velocities, crossing each other with a relative velocity of 6.8 mps, or 11 km/sec. Even with the naked eye and under modest conditions, the Pleiades are rather easily found, roughly 10 degrees north-west of the bright red-giant star Aldebaran (87 Alpha Tauri, mag 0.9, spectral type K5 III). This is a very appealing spectacle, especially for amateurs with less expensive equipment (actually, you can observe it with the naked eye, but even the smallest binoculars or telescopes will increase observing pleasure.

M34 (ou NGC 1039) est un amas ouvert, situé dans la constellation de Persée, à environ 1 630 années lumière du système solaire. Les dernières estimations donnent un âge de 177 millions d'années. Il contient une centaine d'étoiles.

En bas a droite on distingue la petite nébuleuse planétaire Abell 4 (ou PK 144.3 - 15.5), de magnitude 15.6 et de diamètre apparent de 20 secondes d'arc

Photo prise le 17/09/2020

Newton SkyWatcher 200/1000

Monture EQ6-r pro

Canon 1000D défiltré partiel

Correcteur de coma Baader MPCC Mk III

Autoguidage OAG + ZWO ASI 290mm mini

ASIAIR Pro

Traitement Pixinsight + Photoshop CC

80*300s : 6h40'

ISO 800