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M81 and M82 are a pair of galaxies in the constellation Ursa Major. They are located approximately 10 degrees northwest of the Big Dipper's pointer star Dubhe (Alpha Ursae Majoris) and 12 million light-years away from our Solar System. The distance between them is 150000 light years. They are the largest members of the M81 Group, a physical association of 34 galaxies. M81 and M82 are best observed during the spring.
M81 is one of the more celebrated celestial objects in the Messier Catalog. It is known as the Bode's Galaxy and designated also as NGC 3031. It is a spiral galaxy with an apparent visual magnitude of 6.9 and an angular diameter 21x10 arc-minutes. Its diameter is 92000 light years (about half the size of the Milky Way) while its estimated mass is 50 billion solar masses. At the center of M81 lies a 70 million solar masses black hole.
M82, the Cigar Galaxy, is designated also as NGC 3034. It has a distorted and irregular disk due to the gravitational interaction with M81. It is a starburst galaxy, thus it hosts intense star-forming activity. Its apparent visual magnitude is 8.4 and its diameter approximately 37000 light years. Like most galaxies it hosts at its center a supermassive black hole with a mass of approximately 30 million solar masses.
Camera: Canon 350Da (Baader modified) with Hutech IDAS LPS
Telescope: Celestron C8 SCT, with focal reducer (f/6.3)
Mount: Takahashi EM200 Temma Jr
Autoguiding: Toucam 740K, PHD Guiding
Total exposure time: 27min
Exposures in detail:
7 x 180 sec , ISO 1600
1 x 150 sec , ISO 1600
1 x 120 sec , ISO 1600
1 x 90 sec , ISO 1600
2010-03-20
Alignment and stacking: DeepSkyStacker (no dark neither bias frames were used)
Final post-processing: Photoshop CS3
With the tracking mount I now have I was able to go a little crazy with Orion. I did a similar composition before, but on a fixed mount, limited to 1.6 s per exposure. This was 20 seconds per exposure (ISO 3200), with 70 exposures for 23 mintues and 20 seconds of total integration time. This means I was able to bring out much more bightness and detail in the horsehead region, plus render some of the darker clounds in the extended Orion Nebula. Also shot at a longer focal length (300 mm) on a bigger sensor with less crop, yielding a healthy 18 MP. While this was still in alt/az tracking mode, limiting the exposure time somewhat, this is actually a pretty good subject for that circumstance because the center of the Orion Nebula is already clipped at 20 s. Shot on a Nikon Z6III, stacked with DeepSkyStacker.
The Crescent Nebula or Supernova Remnant NGC6888 using the ASi183mm. This is a false color narrowband image meant to mimic what the nebulae would look like in the visible spectrum. H-alpha is assigned to the Red channel, Oiii to the Blue, and 75% Oiii, 25% Ha for the Green Channel.
24X600"Ha, 24X600"OIII
Equipment used:
Stellarvue SVR90T at 504mm, ASi183mm camera, AP900 mount, DeepSkyStacker, PixInsight star alignment, Photoshop levels, curves, blending, guided with ZWO174mm and Canon 200mm.
Equipment
Imaging Telescopes Or Lenses
TS-Optics 6" f/4 UNC Newtonian Telescope - Carbon
Imaging Cameras
ZWO ASI 183 MM PRO
Mounts
Sky-Watcher NEQ6-Pro
Filters
Baader B 1.25'' CCD Filter · Baader G 1.25'' CCD Filter · Baader R 1.25'' CCD Filter · Baader L 1.25'' Filter
Accessories
ZWO EAF Electronic Auto Focuser · TSOptics TS Off Axis Guider - 9mm · Pal Gyulai GPU Aplanatic Koma Korrector 4-element
Software
Luc Coiffier DeepSkyStacker (DSS) · PHD2 Guiding · PhotoShop CS5 · FitsWork 4 · CCDCiel
Guiding Telescopes Or Lenses
TS-Optics 6" f/4 UNC Newtonian Telescope - Carbon
Guiding Cameras
Astrolumina Alccd5L-IIc
Acquisition details
Dates:
Nov. 14, 2020
Frames:
Baader B 1.25'' CCD Filter: 9x300" (45') (gain: 53.00) -20°C bin 1x1
Baader G 1.25'' CCD Filter: 9x300" (45') (gain: 53.00) -20°C bin 1x1
Baader L 1.25'' Filter: 17x300" (1h 25') (gain: 53.00) -20°C bin 1x1
Baader R 1.25'' CCD Filter: 9x300" (45') (gain: 53.00) -20°C
Integration:
3h 40'
I had some time last evening to collect data on the Fireworks Galaxy (NGC 6946) knowing that there was a recent supernova discovered in it, actually back in May of this year. I had the opportunity of collecting data on this galaxy in the past (2015) so I was able to compare the views and see the supernova (see pic) using my own data.
The bottom photo clearly shows the supernova with a distinctive reddish hue.
Tech Specs: Meade 12” LX90 + Antares Focal Reducer +Canon 6D, guided using a Canon 400mm lens and ASI290MC ZWO camera. 24 x 60 second subs at ISO 1600, 3 x 60 second darks and 3 x 1/4000 second bias. Date: September 10, 2017 Location: The Dark Side Observatory, Weatherly, PA.
Target:NGC281 Pacman Nebula, a bright emission and part HII region in the constellation of Cassiopeia at about 9200 light years from Earth.
Location:29/12/2020 from St.Helens UK, Bortle 8 under a full Moon.
Aquisition:25x 180s Ha, 25x 180s (OIII), 21x 180s (SII). Total integration 213min.
Equipment:Imaging: Skywatcher Esprit 100ED, HEQ5, ZWO ASI1600MM Pro with EFWmini and Baader-Planetarium narrowband filters.
Guiding: Skywatcher 9x50 Finder with ZWO ASI120MM.
Software:Capture: NINA, PHD2.
Processing: DeepSkyStacker, Siril, Starnet++, Photoshop.
Memories:Still clear frosty conditions with a full Moon.
I've never used drizzle in DSS before, but I thought I'd give it a crack on this as the galaxies are so tiny. Seems to have yielded some improvement, particularly in M66 - the more interesting of the trio.
Original here for comparison :)
SW ED80/EQ5
Nikon D70 modded, Baader Neodymium filter
84 x 180sec subs, iso 800, for a total of 4 hours 10 minutes
Guiding (RA only): Quickcam Pro4000/9x50 finderscope, PHD
Stacked in DSS (2 x drizzle) and processed in CS5. Spikes by StarSpikes Pro
A globular cluster of approximately half a million stars located 34,000 light years away in the constellation Canes Venatici.
Total exposure time: 31 mins
Telescope: Tele Vue-60 APO refractor
Mount: Vixen Super Polaris
10 x 8-minutes at ISO 1600, f7.5.
The third time I've posted images of this field on Flickr, but this is new data gathered using an EOS 600D modded for astrophotography. I was pleased with the result, although there are 3 flaws:
1. One frame had a diagonal streak, caused I think by a washing line just in front of the scope! You can just see it in the final result. I could have left the frame out of the stack, but I liked the effect!
2. There is a red disk around bright stars (over-exposed on Alnitak), due to out-of-focus infra-red. I've now ordered an IR-cut filter to prevent this.
3. Alnitak has flared over the frame even more than normal - this only affected some frames and I've not got to the bottom of that. I've tried to tone the effect down in the final image.
The exposures were manually, off-axis guided. Sub-exposures registered and stacked using DeepSkyStacker; processed using Canon Photo Professional and Noel Carboni's tools in Abobe Photoshop Elements.
Meade 127mm ED telescope & modded EOS 600D.
Stack out of 7 Pictures with DeepSkyStacker. "Polished" in Photoshop and Lightroom. via 500px ift.tt/2aOdpqs
This is my first attempt at some serious astrophotography. I shot this at Martin's Lookout at Springwood, NSW.
Sony A7 + Canon 16-35mm f/2.8 II L
- 30 x 20s light frames @ f/2.8 24mm ISO3200
- 30 x 20s dark frames
Stacked in DeepSkyStacker with some touches to sharpness, saturation and contrast in Lightroom and Photoshop.
Follow me on Facebook: www.facebook.com/njephotos
The Jellyfish Nebula (left-center) is a supernova remnant. The Monkey Head Nebula is the bright emission nebula near the bottom; the monkey head is upside down looking right here. Both are quite close - the Jellyfish Nebula is an estimated 5,000 light years from earth; the Monkey Head is an estimated 6,400 light years from earth. The large star cluster near the top is Messier 35 (NGC 2168). NGC 2158 is the other smaller star cluster to the lower right of Messier 35.
Acquisition details: Fujifilm X-T10, Samyang 135mm f/2.0 ED UMC @ f2.0, ISO 1600, 150 x 30 sec, tracking with iOptron SkyTracker Pro, stacking with DeepSkyStacker, editing with Astro Pixel Processor and GIMP, taken Mar. 15, 2020 from my Bortle 5 backyard. The Monkey Head and brightest part of the Jellyfish are bright - they were apparent even on my unprocessed subs from my Bortle 5 backyard.
OTA: Celestron C8N, 8" newtonian reflector
Starizona Nexus 0.75x coma corrector (for f/3.75)
Camera: ZWO ASI1600MM
Filters: Baader CMOS-Optimized Ultra-Narrowband
Exposure: Ha 8x10min, Oiii 10x10min, synthetic green
Mount: CEM70G
Captured with SGP
Registered and stacked with DeepSkyStacker
Photographed from Round Rock TX (light pollution zone: red)
Had a go at the bottom section of NGC7000 using my 10" f/4 Newtonian and Atik 314L/SX flterwheel with Narrowband filters. 4 subs at 5min for Ha,5 subs at 5min for SII and 6 subs at 5min for OIII. Each set stacked in Deepskystacker and colour combined (hubble palette) in Maxim dl 4,processed in Photoshop. Autoguided using SX OAG attached to filterwheel and Lodestar with PHD2. Image taken 12/10/15
Markarian's Chain, named after the Armenian astrophysicist, B. E. Markarian, is a chain of galaxies that is part of the larger Virgo Supercluster. The Local Group, including the Milky Way Galaxy, is part of this same cluster. This image was taken from my home observatory in Gravois Mills, MO
Details:
29 x 300s, ISO 800
50 darks, 50 flats, 100 bias
Equipment: Canon 450D, Explore Scientific 80mm APO Triplet, Televue 0.8x Reducer/Flattener
Calibrated in DeepSkyStacker, Processed in Pixinsight
Milky Way with Saturn and Mars
Flickr Expore - June 1, 2016
Bower 16mm f/2 @ f/4
Canon T4i ISO 800 2mins
10x light frames
iOptron Skytracker
DeepSkyStacker Kappa Sigma Clipping
Pixinsight 1.8
46P/Wirtanen as it approaches the Pleiades taken using 18-55mm Canon kit lens,set at 55mm,attached to my QHY168C c/w UHC filter. Camera mounted on EQ6 Pro,no guiding.
5 subs at 180sec each stacked in deepskystacker and processed/cropped in Photoshop CS2.
Image taken 15/12/18
Atik 314L+ with Sigma 70-300 zoom lens (set to 135mm) and Baader 7nm Ha filter (1.25") piggybacked to main scope on a CEM60
Six subframes of ten minutes each stacked in Deepskystacker and processed in PS CS2.
Taken on 29th Sept 2021
Comet C/2022 E3 ZTF moving through my field of view on February 4, 2023.
Tech Specs: Sky-Watcher Esprit 120ED Telescope, ZWO AS2600mc-Pro running at -10C, Celestron CGEM-DX mount, ZWO EAF, ZWO ASIAir Pro, 50 x 60 seconds. Processed using DeepSkyStacker and PixInsight. Image Date: February 4, 2023. Location: The Dark Side Observatory (W59), Weatherly, PA, USA (Bortle Class 4).
M57 aka NGC 6720 is a Planetary Nebula (nothing to do with planets - long story) and is the outer shell of a red giant star that's coming to the end of its life and expelling its outer gasses (or something like that)
Another M bites the dust, and what a piddling little thing this is! Barely bigger than a fat star, I used 3 x drizzle in DSS so that I could actually see the thing. Not best imaged with an ED80 and budget kit, that's for sure. Never done a PN before :)
Been there, done it :)
From last Friday night/Saturday morning, when I only managed 6 increasingly clouded frames before it became totally overcast.
A planetary nebula is so-called because they looked like a planet to early telescope-users. In fact they form when a star blows away its outer layers in a nova.
6 x 4-minute exposures at ISO 1600, f/4. Manually guided off-axis. Modified EOS 600D & Revelation 12" Newtonian reflector telescope.
Registered and stacked using DeepSkyStacker; initial curves adjusted in Canon Photo Professional; noise reduction and final curves adjustment via DxO Optics.
One of my favorite targets - the integrated flux nebula (IFN) or galactic cirrus is faint dust illuminated by our galaxy, and there happens to be a nice concentration of it in the direction of Bode's Nebulae (Bode's (M 81) and Cigar (M 82) Galaxies). The Angel Nebula, which is made of IFN, is in the lower left corner. This is an improvement over my last attempt at this target - shooting raw and more integration time made a difference.
Acquisition details: Fujifilm X-T10, Samyang 135mm f/2.0 ED UMC @ f2.0, ISO 1600, 78 x 60 sec, tracking with iOptron SkyTracker Pro, stacking with DeepSkyStacker, editing with Astro Pixel Processor and GIMP, taken on Feb. 21, 2020 under Bortle 3/4 skies.
Nov 2020 update: The color of M 81 on my original version had always irked me a bit. I reprocessed it and now M 81's color is much better (in my opinion).
Using my 170 exposures of my Star Time lapse, I've stacked the images using DeepSkyStacker. Helping the brightness of the stars to come through.
I'm currently shooting at 30sec exposure and ISO100, can I increase my ISO levels by using Dark noise reduction to see more of the night sky, ie The Milky Way?
Total 142.5min
H-Alpha - 1x600sec, 1x300sec & 5x450sec (52.5min)
RGB - 10x180sec
Stacked in DeepSkyStacker, processed in PS2
Telescope: Celestron C8 (@f/6.3)
Camera: Atik 314L+ Mono
Filters: Baader H-Alpha 7nm, RGB
Mount: AZ EQ6-GT goto, PhD guided using Orion OAG & SSAG.
My first attempt at the milky way using the Canon S90 and CHDK to give me 30 second exposures.
The bright star in the middle of the photo is Altair at the top of the Aquila constellation.
The brightest star on the right is Vega - part of the Lyra constellation.
The brightest star at the top of the picture is Deneb at the top of the Cygnus constellation.
This is a panorama of two photos. The bottom half is 14 minutes in total (stack of 28 x 30 second exposures - would have been 15 minutes if not for the plane flying across). The top half is only 5 minutes due to clouds coming in.
Fujifilm X-T10, Samyang 135mm f/2.0 ED UMC @ f2.0, ISO 1600, 41 x 60 sec, tracking with iOptron SkyTracker Pro, stacking with DeepSkyStacker, editing with Astro Pixel Processor and GIMP, taken Jan 10, 2019.
This is a reprocess of data from earlier in the year - this time I used the 'remove light pollution' and 'HSL selective color' tools of Astro Pixel Processor after integrating light frames in DSS and before editing in GIMP. Also, my flats were introducing artifacts so I didn't use them, but instead corrected vignetting with the 'remove light pollution' tool.
I'm much happier with this version - the color and definition of the nebula are much better, and seem to be accurate in comparison with other images.
A beautiful edge on galaxy NGC4565. The is a fantastic visual object as well from a dark site.
This was shot in a light polluted city with a:
Takahashi TOA130 refractor
TOA130R reducer/flattener
Astro-Physics Mach 1 mount
Qhy8 CCD camera
Astronomik CLC light pollution filter
The shot consist of 28 x 10min subs stacked in DeepSkyStacker.
Montes Apenninus are a rugged mountain range on the northern part of the Moon's near side. They are named after the Apennine Mountains in Italy. With their formation dating back about 3.9 billion years, Montes Apenninus are still relatively young.
Reprocessed, using StarNet to separate the stars from the nebula
Lens: Nikon 180mm ED AI-s f/2.8, shot at f/2.8
Camera: Canon 6D (unmodified)
Exposure: 23x4min iso800
Filter: None
Mount: Celestron CG5-ASGT
Captured with BackyardEOS
Registered and stacked with DeepSkyStacker
Photographed from Marathon Motel, in Marathon TX
Target:M51 Whirlpool Galaxy an interacting spiral galaxy in the constellation of Canes Venatici about 31 million light years away.
Location:30/03/21, St Helens, UK, Bortle 8, 98% Moon.
Aquisition:10x 240s Ha, 60x 60s Lum, 17x 120s Red, 18x 120s Green, 15x 120s Blue. Gain400 Offset40 Bin2x2 Total Integration 3h 20m.
Equipment:Imaging: Skywatcher Explorer 200P, HEQ5 Pro, Baader Mk3 Coma Corrector with LPro, Altair Hypercam 183 M pro, Zwo EFWmini & filter set.
Guiding: Skywatcher 9x50 Finder with ZWO ASI120MC.
Software:Capture: Astroberry with Ekos
Processing: Affinity Photo, Starnet++
Memories:First time using Astroberry-Ekos so really a familiarisation and settings tweaking session. Also first project stacked and processed entirely in Affinity Photo and Starnet++. DeepSkyStacker would not work with the Ha Subs but Affinity had no trouble. Successful outcome but HEQ5 Pro struggling with 13.3Kg payload (limit 11Kg for imaging), EQ6R Pro already on wishlist.
PicA guided image of the spiral galaxy M106 spiral galaxy in the constellation Canes Venatici and six of its galactic neighbors. From left to right and above M106 are NGC 4220, NGC 4231, NGC 4232, NGC NGC 4248, NGC 4217, and NGC 4226. The image was taken with a Canon 400mm f/5.6 L lens on a Canon 7D MKII dslr camera and a 30mm Svbony guide scope with a ZWOASI224MC guide camera. The final image was created from 18 115 second images combined together with Deepskystacker and enhanced with Gimp and Adobe Lightroom. M106 is 25 million light years away from Earthture saved with settings applied.
Added some more subs to this last night (4th clear night on the trot - I MUST get some sleep!) so it's now 1 hour 24 minutes. Better colour I think and I took a little more care over the processing. Also redid the core at 4 seconds.
200p/EQ5 unguided
Nikon D70 modded, iso1600, Baader Neodymium Filter
30 x 4 secs (core)
84 x 60 secs (14-15 January 2012)
Darks, flats and bias
Stacked and processed in DSS and CS5, with help from Noel's Tools
OTA: Celestron C10N, 10" newtonian reflector
Camera: ZWO ASI1600MM
Exposure: Ha 13x10, Oiii 13x10, Sii 13x10 minutes
Mount: CEM70G
Captured with SGP
Registered and stacked with DeepSkyStacker
Photographed from Round Rock TX (light pollution zone: red)
Also known as Caldwell 49 and NGC 2237.
The Rosette is an emission nebula in the constellation Monoceros some 5,000 light years away.
It's thought to be responsible for the birth of some 2,500 stars. A group of which can be seen near the centre, this is the open star cluster NGC 2244 estimated to be about 4,000,000 years old.
Boring Techie bit:
Telescope: Askar FRA400 with .7 reducer
Mount: EQ6r pro
Camera: ZWO 533mc pro
Filter: Optolong L'eNhance.
Guided and controlled by the ZWO asiair+
Best 90% of 40 light frames 180 seconds each.
Stacked with darks, flats, dark flats & bias with DSS.
Processed using Graxpert, PixInsight & Affinity Photo.
Known has the Silver Needle galaxy.
This edge-on loose spiral galaxy is about 13.5 million light years from us in the constellation Canes Venatici. It's estimated to be 65,000 light years from end to end.
Captured on the 6th of March 2024.
Bortle 6, poor seeing.
Boring techie bit:
Skywatcher Quattro 8" Newtonian Reflector steel tube with the f4 aplanatic coma corrector, Skywatcher EQ6 R pro mount, Altair Starwave 50mm guide scope, ZWO asi120mm guide camera mini, ZWO asi533mc pro cooled to -20c gain 100, Optolong L'enhance 2" filter, ZWO asiair plus.
120s exposures.
Best 70% of 90 light frames.
Darks, Flats & Bias.
Stacked with DeepSkyStacker and processed in Affinity Photo
Equipment:
Telescope: Orion XT10i on Skywatcher EQ6 Pro
Camera: Canon 550D unmodified + Baader MPCC
Guiding: Orion Magnificent Mini Autoguider + PHD Guiding
Software: APT, DeepSkyStacker, PixInsight
Images: 10x3min ISO800 Lights; 50x Darks; 50x Bias; 50x Flats
M12 is a globular cluster in Ophiuchus. It is sometimes called the Gumball Cluster.
This was an experiment with unguided imaging after careful PEC training of my mount. Of 20 60s exposures only 6 were usable. Back to the autoguider then!
This is a stack of 6x60s exposures using a QHY22 camera on a 300mm F/4 Newtonian telescopes. Darsk, flats and bias applied. Registered and stacked in DeepSkyStacker and post processing in PixInsight.
Another clear night on Friday. This nebula is a new one for me. Although officially it's in Orion, on a star map it looks closer to Gemini. NGC2174 - The Monkey nebula. It reminds me of the Rosette but this fits my FOV much better!
Skywatcher EQ6. Skywatcher Quattro CF 25cm. QHY8L OSC camera. 80mm shorty + QHY5-ll for guiding. Software - APT and PHD2. 6 x 12 minute exposures plus bias & flats. NO darks.
Processing - DeepSkyStacker and Photoshop.
I tried the globular cluster M13 in the constellation Hercules again this year. This time I used the 1000 mm f/10 Maksutov-Cassegrain telephotolens MC MTO-11CA (nicknamed "Russentonne" or "russian barrel" due to its stocky look and its provenience), together with the Samsung NX30 and mounted onto the Star Adventurer tracking mount. It's actually quite daring to do this, particularly without guiding, since the mount is not really designed for such a long focal length. Nevertheless, I managed to get around 100 reasonably clear 30s subs (although with a woeful success rate of only about 1 out of 3, i.e., 300 acquired, 100 accepted).
Still, I think it was worth the effort. Sharpness is homogeneous and decent after some careful post-processing, and star colours come out nicely after photometric calibration, and -typical for this lens- without any chromatic aberration. The depth of the photo is not awesome with just short of one hour useful integration time, but the galaxy NGC6207 already starts to appear at the top left.
Image details:
Lens: MC MTO-11CA 1000 mm f/10
Camera: Samsung NX30
Mount: Skywatcher Star Adventurer
Guiding: no
Filter: none
Useful subs: 98x 30 s @ ISO3200 (out of 291)
Processing:
Stacking: Deep Sky Stacker with colour calib turned off
Post-processing: SiRiL, fitswork, Luminar 2018
orion nebula. esposizione totale di 21 minuti a 1600 iso con nikon d3000. Somma di 11x60'' + 9x90'' con deepskystacker, post produzione con photoshop. Ho esagerato un attimino in pp, ma l'emozione di essere riuscito a riprendere anche la nebulosa fiamma e testa di cavallo non ha prezzo :D
Equipment:
Telescope: Orion XT10i on Skywatcher EQ6 Pro
Camera: Canon 550D unmodified + Baader MPCC
Guiding: None
Software: DeepSkyStacker, PixInsight
Images: 180x15sec ISO1600 Lights; 25x Darks; 25x Flats
NGC 2683 is a spiral galaxy in the northern constellation of Lynx. It was discovered by the astronomer William Herschel on February 5, 1788. My image was done using 2 hours and 42 minus of collected data, I really love the dark dust lanes visible in this galaxy.
Observation data (J2000 epoch)
Constellation: Lynx
Right ascension: 08h 52m 41.3s
Declination: +33° 25′ 19″
Distance: 30.53 ± 0.91 Mly
Apparent magnitude (V): 10.6
Tech Specs: Orion 8” RC Telescope, ZWO ASI2600MC camera running at -10F, 162 x 60 seconds (2 hours and 42 minutes), Celestron CGEM-DX pier mounted, ZWO EAF and ASIAir Pro, processed in DSS and PixInsight. Image Date: February 5, 2024. Location: The Dark Side Observatory (W59), Weatherly, PA, USA (Bortle Class 4).
Total 2hr 12min 30 sec
H-Alpha - 6x750sec, Oiii - 2x600sec 3x750sec
Stacked in DeepSkyStacker, processed in PS2 (Synth Green).
Camera: Atik 314L+ Mono
Filters: Baader H-Alpha 7nm, Oiii.
Scope: Sky-Watcher Equinox 80ED .
Mount: AZ EQ6-GT goto, PhD guided with Orion 50mm guidescope with SSAG.
The Upper Peninsula of Michigan is a fantastic place for viewing stars. Photo: Milky Way Galaxy over Lake Michigan. Hog Island State Forest Campground at Lake Michigan. Photo stacking via DeepSkyStacker.
OTA: Celestron C8N, 8" newtonian reflector
Starizona Nexus 0.75x coma corrector (for f/3.75)
Camera: ZWO ASI1600MM
Filters: Baader CMOS-Optimized Ultra-Narrowband
Exposure: Ha 10x10min, Oiii 10x10min, synthetic green
Mount: CEM70G
Captured with SGP
Registered and stacked with DeepSkyStacker
Photographed from Round Rock TX (light pollution zone: red)
Stack of 5 20-second exposures aligned in DeepSkyStacker. I light painted the arch with a CTO gel on my LED headlamp.
I made this picture on a pretty clear summer night in France. It was my first try of astrophotography though :)
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.
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.
Date and location : November 2020, Dorlisheim (bortle 5), France
Equipement :
Mount : Sky-Watcher HEQ5 Pro GoTo
Scope : Sky-Watcher Evostar 72ED with OVL Field Flattener
Autoguiding : ZWO ASI 120MM-Mini + 60/280 Guidescope
Camera : Nikon D3300 Astrodon
Filter : Explore Scientific 2" CLS
Acquisition :
Lights : 165x3min, total 8h15
Darks : no darks
Flats : 25
Bias : 125
Software :
Integration : Kstars, Ekos
Pre-processing : DeepSkyStacker
Processing : Siril, Pixinsight
Post-processing : Photoshop
Telescope: William Optics ZenithStar 81 Refractor
Mount: Losmandy GM811G
Imaging Camera: ZWO ASI 2600MC Pro
Filter: Optolong L-eXtreme Dual-band Filter
Site: Elk Grove, California, USA
Calibration Files: None
Guiding: None
Integration Time: 5h 32m
Bortle Zone: Class 6
Processing:
DeepSkyStacker:
- stacked 90% of frames
- aligned RGB final imaged
- saved 32bit image
Photoshop:
- reduced size to 67%
- level/curve adjustment to stretch image
- hue/saturation to change color
- Camera Raw Filter to tweak Exposure, Contrast, Details (mainly for noise reduction)