An underrated area of the Gamma Cygni nebula IC 1318 - vdB 134 is a reflection nebula, reflecting the light of ω1 Cygni about 869 ly distant.

Toward the bottom of the frame is planetary nebula PLN 86 + 5 1.

128 * 3min lights OSC data with a Skywatcher 8" Quattro and Neodymium filter, lots of biases, flats and darks processed in APP, PI and Affinity.

A reprocess of previous data - NGC2244 / Rosette nebula.

ED80 - ATIK16HR - astronomik ha clip/baader OIII filters. Processed in photoshop - capture/stacking nebulosity.

i really must leave this data alone now :D

English below

La nebulosa Pellicano (IC 5070) è una regione H II nella costellazione del Cigno. Insieme alla vicina nebulosa Nord America (NGC 7000) forma un interessante complesso con molte regioni di formazione stellare.

Integrazione di quasi 9 ore, pose guidate da 10 minuti con filtro dualband Antlia ALP-T 5nm, mentre per le stelle 50 pose da 1 minuto con filtro broadband SV260, telescopio newton 150/600 con correttore 0.95x, camera Tecnosky Vision 571C, montatura Eq6-R Pro, elaborazione Pixinsight.

The Pelican Nebula (IC 5070) is an H II region in the constellation Cygnus. Together with the nearby North American Nebula (NGC 7000), it forms an interesting complex with many star-forming regions.

Integration time nearly 9 hours, 10-minute guided exposures with an Antlia ALP-T 5nm dual-band filter, and 50 1-minute exposures with an SV260 broadband filter for the stars. A 150/600 Newtonian telescope with a 0.95x corrector, a Tecnosky Vision 571C camera, an Eq6-R Pro mount, Pixinsight processing.

Taken with a TMB92L, Canon T3i DSLR, Orion SSAG autoguider and 50mm guidescope, and Celestron AVX mount. Consists of 33 130-second light frames and 33 130-second dark frames, all at ISO 800, as well as 32 flat and 50 bias frames. Captured with BackyardEOS, stacked in DeepSkyStacker, and processed in Photoshop.

IC 1805, surnommée la nébuleuse du Cœur, est une nébuleuse en émission située à environ 6 500 année-lumière dans la constellation de Cassiopée.

Au centre de cette nébuleuse se trouve un amas ouvert, Melotte 15

Newton SkyWatcher 200/1000

Monture EQ6-r pro

ASI 2600 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

Prise le 13/02/2021 :

110*300" => 9h10'

Gain 100 - Temp -20°C

DOF

This huge ball of stars predates our Sun. Long before mankind evolved, before the dinosaurs roamed and even before the Earth existed, several star globes condensed and orbited a young galaxy, the Way Milky Of the approximately 200 globular clusters that survive today, Omega Centauri is the largest, with some ten million stars. Omega Centauri is also the brightest globular cluster: with an apparent visual magnitude of 3.9 it is visible to the naked eye for southern observers. Cataloged as NGC 5139, Omega Centauri is about 18,000 light years away and is 150 light years across. Unlike many other globular clusters, Omega Centauri stars have different ages and several chemical traces, indicating that this 12-billion-year globular cluster has a complex history.

Captured 12, december, 2018.

Autor: Mario Poblete

two frame mosaic ic1848 the'Soul nebula' in cassiopeia

a dslr osc image

scope - ED80

Camera - 350D

mount - EQ6, (guided with finderguider)

Filters - eos clip CLS

left pane; 5x600s right pane; 7x600s with calibration frames

stacked in DSS, stitched in Ps process in Ps.

facebook | flickr | 500px | instagram | dcfever

Chatroom (We Speak Chinese)

星空攝影研習社 (Facebook) | 星空攝影谷 (Telegram)

佳節將近，《星野行》在此祝大家聖誕新年快樂。

聖誕樹星團 / 錐狀星雲

近中央三角形分佈的就是聖誕樹星團 (NGC2264)，樹頂位置是倒著的錐狀星星雲，這片美麗的天區是在麒麟座附近，要尋找也不困難。

除此之外圖中還有一些有趣的天體，如緊接聖誕樹左下有點毛毛的是狐狸皮星雲，還有左上像個彎刀的有趣星雲 - 哈勃變光星雲 (NGC2261, Hubble's Variable Nebula)。

Photo by Michael Leung

Date: 5 Nov 2016

Location: 廣東 從化

Camera: ASI 1600MM-C @ -10c

Telescope: Borg 90FL w/0.72x reducer (360mm f/4)

Mount: AZEQ6 Guided ASI120MM-S

Setting: Ha 10min x9, LRGB 3min x8 per channel.

Process: PI, PS CC

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 Andromeda Galaxy also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth. It is the nearest major galaxy to the Milky Way.

Taken with a TMB92L, Canon T3i DSLR, and Celestron CG-4 mount. Consists of 29 40-second light frames and 24 40-second dark frames, 25 5-second light frames and 25 5-second dark frames, all at ISO 800, as well as 11 flat images, stacked in DeepSkyStacker and processed in Photoshop.

In 1771 the French astronomer Charles Messier published a catalogue listing 110 nebulae and star clusters. He did this to help comet hunters discern between fuzzy blobs in the sky that were new comets, or already-discovered deep sky objects. Messier listed each object with the letter “M” (for Messier, of course) and a catalogue number. Unknown to Messier at the time was the fact that some of these “nebulae” were discreet galaxies like our Milky Way, located millions of light-years from us on Earth. My photo brings you three of these Messier objects, M31, M33 and M110. Apart from their dry catalogue names, two of these galaxies have the common names of the “Andromeda Galaxy” (M31) and the “Triangulum Galaxy” (M33).

I captured this photo without the use of a telescope or telephoto lens. I shot nine pictures of the foreground and sky, plus twelve “dark” frames, which were combined in software to reduce the amount of digital noise present. For all of the twenty-one images, I used the same equipment and settings. These were my Canon EOS 6D Mk II camera, a Yongnuo 50mm f/1.4 lens @ f/2.0, using an exposure time of 6.0 seconds @ ISO 12800.

English below:

Nella parte più meridionale della costellazione del Cigno si trova il resto di supernova G65.2+5.7 esteso per circa 180 parsec. La sua parte meridionale è nota come Sh2-91: una dedole e bella struttura filamentosa distante da noi circa 2600 anni luce. Nella parte alta, al centro, è presente la piccola nebulosa planetaria PK064+05.1 attorno alla stella HIP96295 che appare molto arrossata.

Somma di pose guidate da 10 minuti per un totale di 16 ore e 50 minuti con filtro dualband Antlia ALP-T 5nm per la nebulosa mentre per le stelle sono una ventina di minuti di pose da 60 secondi senza filtri. Telescopio newton 150/600 con correttore Tecnosky 0.95x, camera Tecnosky Vision 571C, montatura Eq6-R Pro, elaborazione in HSO in Pixinsight.

In the southernmost part of the constellation Cygnus lies the supernova remnant G65.2+5.7, which extends for about 180 parsecs. Its southern portion is known as Sh2-91: a beautiful, intricate filamentary structure about 2,600 light-years away. In the upper center, the small planetary nebula PK064+05.1 orbits the star HIP96295, which appears very red.

A total of 16 hours and 50 minutes of guided exposures were taken using an Antlia ALP-T 5nm dual-band filter for the nebula, while the stars were taken for about twenty minutes of 60-second exposures without filters. 150/600 Newtonian telescope with a Tecnosky 0.95x corrector, Tecnosky Vision 571C camera, Eq6-R Pro mount, and HSO processing in Pixinsight.

A colour take on the California Nebula (NGC1499).

The California Nebula is an emission nebula located in the Northern constellation of Perseus, approx 1300 light years distant.

Taken through Luminance/Red/Green/Blue filters on a monochrome astrocamera. The result is a 4 panel mosaic of 36 minute (9 x 240s) exposures on each filter, and each of four panels. That's around 9.6 hours total exposure (2.4 hours on each panel).

T: William Optics 81GTF.

C: ZWO ASI533MM-Pro.

M: Pegasus NYX-101.

G: OAG & ZWO ASI220MM.

R: Pegasus Falcon V2.

EFW: ZWO Electronic Filter Wheel (2" LRGB only).

EF: Pegasus FocusCube 3.

S: NINA to Capture and APP & Photoshop to process.

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?

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.

A widefield Bi-Color image of the Rosette Nebula (NGC 2237, also known as Caldwell 49).

The Rosette Nebula is a large spherical H II region located near a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the Nebula.

The star cluster and nebula are at a distance of 5,000 light-years from Earth, and is roughly 50 light years in diameter. The radiation from the young stars excite the Hydrogen atoms, producing the emission nebula.

About this image:

This is one of the "First Light" DSO targets taken with my WO Star 71 APO Refractor, and is also my first Bi-Color Narrowband image (imaged in the spectral wavelengths of 7nm Hydrogen Alpha (Ha) & 8.5nm Ionized Oxygen (OIII).

Photographed in the rural dark skies of the Waterberg, Limpopo, South Africa (on a very warm Summer's evening).

Gear:

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

William Optics 50mm Finder Scope.

Celestron SkySync GPS Accessory.

Orion Mini 50mm Guide Scope.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

Canon 60Da DSLR.

Astronomik Clip-In CLS Light Pollution Filter.

Baader H-alpha 7nm Narrowband Filter.

Baader OIII 8.5nm Narrowband Filter.

Tech:

Guiding in Open PHD 2.6.2.

Image acquisition in Sequence Generator Pro.

Lights/Subs:

12 x 500 sec. ISO 3200 Ha FIT Files (Mapped to Red).

12 x 500 sec. ISO 3200 OIII FIT Files (Mapped to Blue).

Synth Green from Ha and OIII mix (Mapped to Green).

15 x 180 sec. ISO 3200 CLS FIT Files (Luminance from RGB).

Calibration Frames:

40 x Bias

25 x Darks

18 x Flats

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry Info:

nova.astrometry.net/user_images/1342508#annotated

RA, Dec center: 98.0848483205, 5.01338558942 degrees

Orientation: 1.64562481574 deg E of N

Pixel scale: 7.32212325414 arcsec/pixel

Martin

-

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

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

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

-

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

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

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.

The Lagoon Nebula (M8) at the bottom, the Trifid Nebula (M20) at the top.

Nikon D5600 with a Nikon AF-P DX VR 70-300mm lens, mounted on a Sky-Watcher Star Adventurer. Thirty 60-second exposures at f/6.3, 270mm, ISO 3200. Shot 7/31/19 at Pinnacles National Park.

Processed in PixInsight and Photoshop. This is the first picture I've gotten all the way through PixInsight.

This is a re edition of a capture made on 20 of July.

This was one my first captures made with the Canon T6i.

Omega Centauri is a giant! The biggest globular cluster of the milky way.

Setup:

88x60s, ISO 1600

Canon T6i

Long Perng 66/400

iOptron CEM25P

The Leo Tripet, about 35 million light years away from us, here on Earth.

Equipment:

Celestron CGEM Mount

Nikon 500mm f/4 P Ai-s @ f/5.6

Sony a7RIII (unmodified)

Altair 60mm Guide scope

GPCAM2 Mono Camera

Acquisition:

Taos, NM: my backyard - Bortle 3

15 x 240" for 60.5 minutes of exposure time.

10 dark frames

20 flats frames

20 bais frames

Guided

Software:

SharpCap

PHD2

DeepSkyStacker

Photoshop

My mount was polar aligned with SharpCap (what an amazing system for aligning). I'm not comfortable using my SCT as my lens yet. My solution is to piggy back my Sony a7RIII and adapted Nikon 500mm f/4 on a ADM dovetail rail on the top of my optical tube. I had to throw away about 5 frames due to satellites passing through or near my targets. This was low on the horizon and when I came out to end my imaging session I found my guidescope not being able to guide and had to delete my last 3 frames becasue the images were not sharp. It was a fun learning experience, looking forward to trying again when this target is higher in the sky.

facebook | flickr | 500px | instagram | dcfever

Chatroom (We Speak Chinese)

星空攝影研習社 (Facebook) | 星空攝影谷 (Telegram)

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)

Elephant Trunk Nebula captured during full moon from Farmoor, Oxford, UK. 21-10-2021.

The Elephant's Trunk Nebula is a concentration of interstellar gas and dust within the much larger ionized gas region IC 1396 located in the constellation Cepheus about 2,400 light years away from Earth. It is commonly called the Elephant's Trunk nebula because of its appearance at visible light wavelengths, where there is a dark patch with a bright, sinuous rim. The bright rim is the surface of the dense cloud that is being illuminated and ionized by a very bright, massive star (HD 206267) that is just to the east of IC 1396A. The entire IC 1396 region is ionized by the massive star, except for dense globules that can protect themselves from the star's harsh ultraviolet rays.

The Elephant's Trunk Nebula is now thought to be a site of star formation, containing several very young (less than 100,000 yr) stars that were discovered in infrared images in 2003. Two older (but still young, a couple of million years, by the standards of stars, which live for billions of years) stars are present in a small, circular cavity in the head of the globule. Winds from these young stars may have emptied the cavity.

The combined action of the light from the massive star ionizing and compressing the rim of the cloud, and the wind from the young stars shifting gas from the center outward lead to very high compression in the Elephant's Trunk Nebula. This pressure has triggered the current generation of protostars.

4hrs 15mins intergration, 10x480-10x420-10x300 L-Exstreme + 5x600 HA.

WO Z61ii - ASI294MCPro - SWNEQ6-R-Pro - Nina - Stellarium - PH2 - DSS - Photoshop.

facebook | flickr | 500px | instagram | dcfever

Chatroom (We Speak Chinese)

星空攝影研習社 (Facebook) | 星空攝影谷 (Telegram)

南冕座分子雲 Corona Australis Molecular Cloud

多年前看到同好所拍的照片後已被這堆黑黑的東西吸引著。但是南冕座在香港的觀測仰角較低，加上香港的空氣污染，要拍這個天體實在苦惱。

去年到南半球外遊，看著它高掛半空當然不能放過這機會。

南冕座在天蝎座尾部的文東南邊。這片分子雲結構離我們約 500 光年，算是離我們比較近的造星區之一。黑厚的塵埃遮擋了背景的銀河繁星，也藏著年輕新形成的恆星。近中央藍色的是反射星雲 NGC6726, NGC6727, IC4812。旁邊的星團 NGC6723 其實在很遠的背景約三萬光年距離。

Photo by Michael Leung

Location：New Zealand - Lake Tekapo

Date: 2015/04/16

Mount: iOptron ZEQ25 guided QHY5LII Mono

Camera：CentralDS 600D @ -20c

Telescope：Borg 90FL w/0.72x reducer (360mm f/4)

Setting：ISO1600, 240s x17, Dark, Bias

Process: PI, PS CC

A quick image of Messier 27, before exam season begins. Taken during nautical twilight since it doesn't properly get dark here in the UK now until August.

Details:

Skywatcher 200PDS

Skywatcher HEQ5 Pro

Canon EOS 700D

59 x 30s ISO800 subframes, stacked in Deep Sky Stacker and processed in IRIS and GIMP.

My very first time shooting the Orion Nebula using my new iOptron Skyguider Pro. This was taken in the small town of Benezette, PA at the Elk Viewing Area.

Nébuleuse de l'Iris - NGC7023

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

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

facebook | flickr | 500px | instagram | dcfever

Chatroom (We Speak Chinese)

星空攝影研習社 (Facebook) | 星空攝影谷 (Telegram)

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

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.

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.

NGC 2264 a.k.a. Christmas Tree Cluster

…………………………..................................

Before going into details, the catalog number NGC 2264 does not refer to a single deep sky object, but to four, in the attached image only three can be seen, namely:

- Cone Nebula, an emission nebula that can be seen at the top of the image, being easy to find due to the shape of the nebula, the shape that gave it its name.

- The Christmas Tree Cluster, which stretches over the area between Cone Nebula and the bright star in the center.

- Fox Fur Nebula, which can be seen in the lower left, so named because of the apparent texture that this nebula has in that area.

The 4th DSO that completes the list of cosmic objects that belongs to NGC2264 and which is unfortunately missing from the attached image, is a small cluster, called Snowflake ( of course 😊)

As general information, NGC2264 is about 2700 light-years from us, in the constellation Monoceros, and was discovered by William Herschel almost 250 years ago, on December 26, 1785. Being an emission nebula, NGC2264 is formed mainly from cosmic dust and gases, hydrogen being the most common. That blue "cloud" is just a patch of cosmic dust illuminated by the central star, easily visible.

……………………….

Equipment and settings:

Mount: Skywatcher Eq6 R

Telescope: 150/750 Newtonian telescope

Camera: ASI 533MC Pro

Total integration: 9h30’

Stacking in Deep Sky Stacker.

Edit in Pixinsight and Lightroom.

Location: my Bortle 6+ backyard.

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]

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

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.

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

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'

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

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

Orion and running man nebulae. Eos 600d and sharpstar 61 edph II. 2022/12/27

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

The very bright Tarantula Nebula (also known as 30 Doradus or the Doradus Nebula) is an H II region in the very dense Large Magellanic Cloud (LMC). The Tarantula Nebula is the most active starburst region known in the Local Group of Galaxies.

About this image:

This wide field image consists of 14 x 2 minute exposures at ISO 6400. Photographed in the rural dark skies of the Karoo (Northern Cape, 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.

Aurora Flatfield Panel.

Celestron AVX Mount.

Celestron StarSense.

Canon 60Da DSLR.

Tech:

Guiding in Open PHD 2.6.1.

Image acquisition in Sequence Generator Pro.

Lights/Subs: 14 x 120 sec. ISO 6400 CFA FIT Files.

Calibration Frames:

50 x Bias

30 x Darks

20 x Flats

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry Info:

nova.astrometry.net/user_images/1191958#annotated

RA, Dec center: 84.5358996211, -69.1714612158 degrees

Orientation: 1.16214860863 deg E of N

Pixel scale: 6.80102321917 arcsec/pixel

Martin

-

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

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

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.

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

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]

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

facebook | flickr | 500px | instagram | dcfever

Chatroom (We Speak Chinese)

星空攝影研習社 (Facebook) | 星空攝影谷 (Telegram)

星空調色盤 (Rho Ophiuchi and Antares region)位於天蝎座頭和蛇夫座邊界位置的這個區域，有著色彩悅目的星雲結構。離地球約 500 光年距離， 是離我們最近的造星區域之一。

利用 360mm 焦距拍攝這個區域好像有點尷尬… 幾個高亮天體都被擠到邊邊處。本來想以 mosaic 方式拍攝可惜天氣並不理想，有機會再去南天旅行一定要再好好拍拍這個區域。

圖中可見多個有趣的天體。右下最光橙紅色的星是大火心宿二。 旁邊是反射星雲 IC4606，因為心宿二的關係呈現出比較少見的橙黃色。右上是球狀星團 M4。 它其實在背景比較遠的位置， 離地球約 7200 光年，左下還有一個小一點的球狀星團 NGC6144。圖左上角蛇夫座 Rho 星和旁邊兩顆星有著很有趣的米奇老鼠造型。包圍著的藍色反射星雲是 IC4604。

香港拍攝難度：★★★ (五星最高)

建議鏡頭焦距：100 ~ 135mm

適合拍攝月份：3 月 ~ 8 月 (香港)

大概位置：天蠍座近心宿二附近

Photo by Michael Leung

CentralDS 600D

Borg 90FL w/ 0.72x Reducer (360mm f/4)

iOptron ZEQ25

Guidled QHY5LII Mono

ISO 1600, 240s x21