View allAll Photos Tagged CrescentNebula
This photograph represents first light for my new camera: QSI 683ws-8. I had very little time to test the camera at home prior to taking it to the Goldendale Star Party where this image was taken.
Image Details: 10 subs of 10 mins each at F3.6 and 380mm (FSQ 106ED with reducer). 5nm astrodon filter. Flats and darks applied.
There are a couple of problems with this image: Exposure time wasn't sufficient. I would have liked atleast 4 hours. Unfortunately at this latitude 3 hours of darkness is all we get in early/mid July.
Worse, this image is not critically focused.
On the plus side you can see the newly discovered soap bubble nebula in this shot!
La constellation du Cygne à 35mm (équivalent à 50 mm en 24x36): 11 photos, 3 Darks, 9 Offsets ; 10 Flats. Assemblage dans IRIS et cosmétique dans Photoshop CS4. Nikon D5300 modifié astro par Eos for Astro, Nikkor AF-S 24-70mm F/2.8, télécommande Twin1 ISR2 + Monture Astrotrac 320x+ filtre IDAS LPS-D1-N
Paramètres: 11x 270s F/3.5 ISO 1250, 35mm.
Série prise le 23.8.2017
Added another 4 hours to my #NGC6888 #CrescentNebula more data definitely improves it. But I can’t stop seeing the odd shaped stars due to my spacing issues.
LARGE IMAGE:
astroanarchy.blogspot.com/2008/11/ngc6888-crescent-nebula...
Imaging data:
Camera, QHY8 - Filters, Baader 7nm H-alpha, Baader 8,5nm O-III and Baader 8nm S-II - Optics, Tokina AT-X 300mm @ f2.8 - Exposures, 4X 1200s H-alpha, 3 X 1200 O-III and 2X1200s S-II + flats and bias - Guiding, LX200 GPS 12" + PHD-guiding and Lodestar
The area around Gamma Cygnis contains a lot of H alpha nebulosity. Most notably the Crescent nebula NGC6888.
Crescent Nebula wide field in HST-Palette (R=SII,G=H-Alpha,B=OIII).
EOS 500Da + EF 5,6/400mm L on Avalon Linear Mount.
Guiding: MGEN
Exposures:
8:10h H-Alpha 12nm
5:20h SII 12nm
4:45h OIII 12nm
NGC 6888, the Crescent Nebula. This is a shell of hot gas blown off the central star (WR 136).
Combination of two night's data:
3 hours of RGB (18 x 10 minutes)
3.5 hours of Hydrogen Alpha (21 x 10 minutes)
Total 6.5 hours
Camera: QHY8
1000mm @ f/4.9
This is my first try with the new hydrogen alpha filter. I like it! I'm hoping to get some deep, wide field images this Winter. Unfortunately the weather clouded over so I only got a couple of shots in. This is a "short stack" of 2 images, each 10 minutes at ISO 1600, 50mm and f/4.
CCD Atik 314L+.
AstroProfessional 102mm refractor (focal 714mm).
HEQ5 Pro Goto autoguided (by Takahashi FS60 refractor with a DMK31 and PHD Guiding).
LRGB (Astrodon filters).
Luminance (IR cut): 9x5min (45 min), binning 1x1.
RGB: 3x5min (15 min) each layer, binning 1x1.
Total: 1h45.
Processed with Iris (dark, flat, offset, registration, addition, DDP, wavelet).
Location: Méribel-Mottaret (Savoie - France).
Date: 07/08/2010 - 23h22 to 02h17 UT.
Yesterday I was able to add more than 4h of OIII so I created a pseudo RGB from H-Alpha and OIII data. Hopefully this week I can take SII and some RGB data as well.
This is a 70% scaled and cropped to 800x800pix small part of the much larger field shown in the previous H-Alpha widefield.
Exposures so far (all @ f5,6/ISO 800):
H-Alpha: 33x10 min = 5:30h
OIII: 20x15min = 4:10h (some exposures were < 15min)
Taken with EOS 500Da + Canon EF 5,6/400mm L on Avalon Linear Mount.
12nm Astronomik Clip-In filter H-Alpha and OIII.
Guiding with 60mm guidescope and MGEN autoguider
NGC 6888 shown in H-Alpha, OIII and SII, all taken with Astronomik 12nm Clip-In filters in a 500Da. Exposures were:
8:10h H-Alpha 12nm
5:20h SII 12nm
4:45h OIII 12nm
Clearly H-Alpha is much stronger than the weaker OIII and even weaker SII channel.
Three color combination schemes are presented: A synthetic RGB, the well-known Hubble Palette and a modified Hubble Palette which reduces the dominance of H-Alpha and better shows OIII contribution.
IC 1318 Gamma Cyg Nebula with Crescent Nebula in Cygnus. This area of the sky is dominated by a large amount of emission nebulosity running along the Milky Way galactic arm that is visible to us.
Details here:
The Sadr region has many emission nebulae. The butterfly nebula (upper left) and the crescent nebula (lower right) are the most prominent here, but many filamentary regions in between are captured here as well. These regions are more obvious in the Halpha image.
Taken as a 4-panel mosaic and processed in pixinsight. The focus shifted throughout the night since the temp dropped faster than expected. As a result, the right panels appear sharper than the left.
Imaging scope: Astro-Tech 65 Quadruplet
Imaging Camera: ST8300M (capture with Equinox Image)
Filters: Baader filters in FW5-8300 filter wheel
Guide scope: Astro-Tech 106mm Triplet
Guide camera: Starfish Fishcamp (guided with PHD)
Mount: Atlas EQ-G
Calibrated in Equinox Image and processed in PixInsight.
L - 6x1min (1x1) per panel
RGB - 3x1min (2x2) per panel
Halpha - 6x3min (2x2) per panel
Reworked the data from GSSP and here is the nearly full view of the stack. I've learned quite a bit from RBA's PI workshop and have applied much of what I learned here. I'll probably come back to this data set a few more times before I'm done.
Some things yet to figure out:
1. Try to register/stack in PI. Currently, this is from source in DSS.
2. Figure out robust ways to generate and use star masks to keep stars small. I kept them small here, but a lot of the little ones still came up.
3. Figure out better noise reduction techniques.
I'm pleased that the nebulosity came up so well.
10 minute subs at 400 ISO with a cooled DSLR - full spectrum modified Pentax K10D.
Prime focus on Stellarvue SV4 using flattener and Baader Moon and Skyglow filter
Stacked with 80% best out of 71 subs in DSS 3.3.3 beta 47
Stacking broken up by temperature and camera rotation in an attempt to control amp glow.
Processing in PI for DBE, MT, Stretching.
Annotated in PI as well.
Here are the results from the plate solve:
Referentiation Matrix (Gnomonic projection = Matrix * Coords[x,y]):
-0.000015711578 -0.000531392482 +0.671504498025
+0.000530938144 -0.000015467146 -0.963770026367
+0.000000000000 +0.000000000000 +1.000000000000
Resolution ........ 1.913 arcsec/pix
Rotation .......... 88.295 deg
Focal ............. 582.24 mm
Pixel size ........ 5.40 um
Field of view ..... 1d 58' 0.1" x 1d 17' 5.7"
Image center ...... RA: 20 12 17.874 Dec: +38 21 08.17
Image bounds:
top-left ....... RA: 20 15 40.674 Dec: +37 23 07.99
top-right ...... RA: 20 15 28.212 Dec: +39 21 02.44
bottom-left .... RA: 20 09 12.726 Dec: +37 20 55.20
bottom-right ... RA: 20 08 49.603 Dec: +39 18 45.93
Subject: Medium widefield of Cygnus area -- NGC7000, NGC6888, IC1318, IC5067, IC5070 -- North America Nebula, Pelican Nebula, Crescent nebula, etc.
Image FOV: approximately 14.9 degrees by 15.1 degrees
Image Scale: 60 arc-second/pixel
Date: 2009/07/04
Exposure: 10 minutes for each panel, 13 panels = 2h10min total exposure, ISO800, f/4
Filter: Baader 7nm H-alpha
Camera: Hutech-modified Canon 30D
Lens: Leica APO Telyt-R 180mm f/3.4 at f/4
Mount: Astro-Physics AP900
Guiding: ST-402 autoguider and SV80S guidescope. MaximDL autoguiding software
Processing: Raw conversion and calibration with ImagesPlus; Gray conversion, levels adjustment with Photoshop CS4. No sharpening or noise reduction. Autopano Pro used to create the mosaic. Resizing and JPEG conversion with Photoshop CS4.
Remarks: Temperature at end: 41F; SQM-L readings start to end: 19.38, 19.63, 19.69, 19.80, 19.91, 20.06, 20.25, 20.36, 20.63, 20.94, 20.78 (setting moon, then high clouds moving in)
20210625 - Cloudy Nights = Education time 👍
Improving on the processing skills, learning Pixinsight, binge-watching tutorials (Thank you, Mitch. Nice tutorials!), reading hints and tricks. All this to improve on the captured old data, and discover that there’s more in the image data compared to what was first imagined. The imagination is (sometimes) limitless.
What was the experience
Reprocessed my data of NGC 6888 from 20210606, and step by step improved on the background neutralisation, noise reduction, HDR, star mask, color saturation … and was surprised how sometimes very subtle tweaks can have a huge impact on the appearance of an image.
What’s in the picture(s)
NGC 6888 - The Crescent Nebula
How it was done
Mount: iOptron SkyGuider Pro
Guiding: ASIAIR Pro, ZWO30F4, ASI120MM (RA guiding only)
Scope: WO RedCat 51
Camera: ASI183MC Pro
Resolution: 1,98”/pixel
FoV 218’ - no crop
Filter: Optolong L-Extreme
Moon n/a, Bortle 5/6
Processing: Pixinsight (calibration, stacking/integration, processing) - (Mac)
NGC 6888 - Gain 125, cooling -10, 300s, 57/60x (3 subs rejected, 5hrs integration time)
Darks 31x (added new darks to further remove the amp glow and improve on the image quality)
Also on Astrobin: astrob.in/7uw32p/C/
What have I learned from this
Never think your data isn’t good enough. Just improve on your skills. Sometimes stones contain hidden gems. It doesn’t get easier in carving them out, you just need to get better.
Clear Skies everybody! ✨🔭
#astrophotography #astrophoto #astrophotos
#backyardastronomy #astronomy
#backyardastrophotography
#NGC6888 #CrescentNebula
#Pixinsight
Subject: Widefield of Cygnus area -- NGC6888, NGC6960, NGC6974, NGC6979, NGC7000, IC1318, IC5067, IC5068, IC5070, etc. --
North America Nebula, Pelican Nebula, Crescent nebula, Veil nebula, etc.
Image FOV: roughly 32 degrees by 21 degrees (partial coverage)
Image Scale: roughly 60 arc-second/pixel
[see "Cygnus Widefield (56 panels) for other shooting data]
18x180 secs, dark and bias, no flat
Canon 7D Astrodon Inside
ISO 800
400 mm @ F5.6
Astronomik CLS filter
AstroTrac unguided
Very low altitude when shot + very bright moonlight
Uncropped + drizzling x3
The Crescent Nebula (NGC 6888) is an expanding shell of energetic gas surrounding a dying star. This image was enhanced with data captured through a Hydrogen-Alpha filter to capture the detail in the faint surrounding nebulosity.
NGC 6888 in the constellation of Cygnus is an emission nebula better known as the Crescent Nebula, some 4700 light-years away.
Central star WR136 is shedding its outer layers at a rate equivalent to the Sun's mass every 10,000 years as a fast stellar wind that's colliding with an older, slower mass ejection, heating the gases so that they glow.
This image is the sum of 40 45-second ISO1600 exposures with an astro-modified Canon 1100D plus an Astronomik CCD-CLS filter at the focus of an Altair 8-inch f/4 Newtonian plus coma corrector on an unguided Celestron CG5-GT mount.. Mid exposure was 21:10 UT on May 25th, 2014.
NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. Near the center of this intriguing widefield view of interstellar gas clouds and rich star fields of the constellation Cygnus, NGC 6888 is about 5,000 light-years away.
The Crescent Nebula, imaged in SHO with a 235-mm SCT and 0.7x reducer. Processed with Dynamic Narrowband technique. 8.0 h total exposure.
The Crescent Nebula in the constellation Cygnus the Swan.
About 25 minutes' worth of data @ ISO800. This is the first time I've ever captured this, and for an elusive target I am quite pleased with my results!
NGC6888 The Crescent Nebula
Telescope: 24" RCOS with Alta U42 CCD.
Narrow band filters, Ha,SII and OIII mapped RGB.
The Crescent Nebula is a cosmic bubble about 25 light years across, blown by the winds from its massive central star, visible within the nebula. This star, a Wolf-Rayet star (WR 136), is shedding its outer envelop in strong stellar wind while also burning its remaining fuel at a prodigious rate. Nearing the end of its stellar life, this star should eventually explode as a spectacular supernova. In the meantime, the nebula itself, which is about 5,000 light years from earth, exhibits complex structures that are likely the result of the strong stellar wind interacting with materials previously ejected from the same star. (Adapted from APOD, 10th June 2016)
This view shows only the emission from hydrogen atoms. (Hydrogen Alpha, Ha)
--------------------------
This image has been produced from the same dataset from a previously posted image:
www.flickr.com/photos/theordinaryphotographer/48096457891...
August 28, September 1-3, 2018
from Fremont, California
(from home!)
Ha: 10 x 20 min
OIII: 12 x 20 min
Narrow band data only (no LRGB added)
(Total integration time of 7.3 hours)
(all binned 1x1)
QSI-690
AT6RC with field flattener
Fast test after five months rest due to the cloudy nights.
Lens: Samyang 135mm F2.0
Camera: ZWO ASI294MC Pro
Mount: iOptron CEM25p
Guiding camera: ZWO 120MM Mini
Total 112mins exposure
Setup used : www.flickr.com/photos/stormlv/8388012341/in/photostream/
---Photo details----
Stacks : 14x12min
Exposure Time : 2h48min
Stack program : Maxim DL v5
Stack mode : Sigma clip
Post processing : MaximDL v5 and Photoshop CS5
---Photo scope---
Camera : Atik 460EX
CCD Temperature : -5 Celsius
Filter used:
- Astrodon 5nm Hα 36mm unmounted
Tube : Skywatcher StarTravel-102
Type : Refractor
Focal length : 500 mm
Aperture : F/4.9
---Guide scope---
Camera : Starlight Xpress Lodestar
Guide exposure : 1 sec
Starlight Xpress Off Axis Guider
---Mount and other stuff---
Mount : Skywatcher NEQ-6
Filter wheel : Starlight Xpress
---Image details---
Objects
----------
Sky-Watcher 80ED Pro Black Diamond - Canon EOS 500D
Filtri Baader UHC-S , Baader UV-IR
Pose: 5x1200" ISO800 + 3Dark + 25Bias
Temperatura: 10.00
The Cygnus Region (Deneb and Sadr)
SXVF-M25C on 90mm Tamron Macro lens mounted on EQ6 SkyScan Mount. 23 subs of 250 secs. each, F4, guided, processed in PS7.
Average seeing, poor transparency
19/05/10
Manually off-axis guided for 6 x 10-minute exposures at ISO 1600, f6.3. Images registered and stacked using DeepSkyStacker.
Celestron C8 telescope & unmodified Canon EOS 40D
Slightly different camera settings than previously and with UV/IR filter.
Sky-Watcher Quattro 150P f/3.5
Player One Uranus-C OSC (Offset:20 / Gain:90)
UV/IR filter
75 x 140sec. subs (2hr 55mins.)
Processed in Astro Pixel Processor, GraXpert and Affinity Photo
The Crescent Nebula is a cosmic bubble about 25 light years across, blown by the winds from its massive central star, visible within the nebula. This star, a Wolf-Rayet star (WR 136), is shedding its outer envelop in strong stellar wind while also burning its remaining fuel at a prodigious rate. Nearing the end of its stellar life, this star should eventually explode as a spectacular supernova. In the meantime, the nebula itself, which is about 5,000 light years from earth, exhibits complex structures that are likely the result of the strong stellar wind interacting with materials previously ejected from the same star. (Adapted from APOD, 10th June 2016)
This view shows only the emission from oxygen atoms. (Oxygen III, OIII)
--------------------------
This image has been produced from the same dataset from a previously posted image:
www.flickr.com/photos/theordinaryphotographer/48096457891...
August 28, September 1-3, 2018
from Fremont, California
(from home!)
Ha: 10 x 20 min
OIII: 12 x 20 min
Narrow band data only (no LRGB added)
(Total integration time of 7.3 hours)
(all binned 1x1)
QSI-690
AT6RC with field flattener
Newest image of the Crescent Nebula, NGC6888. Fairly shallow data set comprising a mediocre (HaL) (HaR)GB combine. Taken over the long Fourth of July weekend this summer. Finally had time to look at the data during the Thanksgiving holiday. Combined total exposure of about 6 hours over 4 days. Taken with the DSI RC10C 10" R-C scope and STL-11K camera on the MI-250 mount. Same equipment used as my last attempt on the Crescent, just different data and processing.
NGC 6888
Imaged with "Astro Modified" Canon EOS 5D Mark II
37x10min images @ ISO400
Astro-Tech AT8IN 8" F/4 Newt w/MPCC
CGE Mount
30x10min Darks, 30 Flat/Flat Darks/Bias frames.
BackYardEOS for image aquisition
Pre-processing in IRIS
Final touches in PS-CS3
Thanks to Terry Hancock for processing!!
This is a slight crop from the full frame image due to slight vignetting thanks to the massive 35mm sensor in the 5D Mark II 8^)
I am processing some NarrowBand OIII images I took to add to this data...hope it will bring out some of the very faint outer shell around this Nebula.
Thanks
Of all the wondrous things I see in the universe, its these objects that intrigue me the most. Perhaps that is because they are glimpses of our own Sun's fate billions of years from now.
This is a planetary nebula called M27, aka the Dumbbell Nebula. The word planetary comes from its disk-like round shape as seen in telescopes.
Complex organic molecules are now known to form in these short lived nebulae and they spread into interstellar space throughout the galaxy. It is entirely possible that when our solar system formed 4.5 billion years ago, the ingredients in the solar nebula might have included these organic compounds essential for the beginning of life. So the age-old question, does life exist elsewhere? I think so.
The dying single star at the center is very hot and blowing its own material away into space. It is ionizing the gases causing them to emit at certain narrowband wavelengths that correspond to certain colours. I used 3 different filters to capture this object; 5 hours each of hydrogen-alpha which is red, oxygen III which is green, and hydrogen-beta which is blue. I also photographed the surrounding stars with typical RGB broadband filters. for a total of 17 hours of data in this photo.
Technical details:
telescope: Ceravolo300 at f/9
Camera: SBIG Aluma 694
Filters: Astrodon RGB Ha, Hb and OIII
16.5 hours
Location: Personal observatory, BC, Canada
Reprocessed data.
Total of 5.9 Hours so far. I would like to get more though.
HA 9 x 900s
OIII 12 x 900s
SII 2 x 1200s
Bin 1x1
No darks or flats
40 x Bias
SW Equinox 80 APO and Flattener
EQ5 Pro Synscan GOTO.
Guiding: SW 9x 50 finder guider and QHY5.
Atik 314L+
Baadar HA 7nm, OIII 8.5nm and SII 8nm
Using: Artemis capture, PHD, DSS, CCD Sharp, Nebulosity 3 and Photoshop CC.
Vicky N
Leicester
NGC6888, called the Crescent Nebula, is barely visible in this RGB color image, taken Aug 21 2014, with a 10" Royce Newtonian FL 1524mm Diam 254mm f/6, at Sunnyvale, California (backyard). Imaged with an Orion Starshoot Pro (V1) Camera, Baader MPCC coma corrector, and a Schneider 486 UVIR Filter. This is a stack of 5 images of 500sec each. The final image was stacked in personally developed software, then stretched with the log(log{log[]}) function, and adjusted in Photoshop CS5 for color balance. The corresponding Halpha light at 656nm is an another image (should be next to this one), and that image shows the nebular gas more clearly.