View allAll Photos Tagged CrescentNebula
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)
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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.
Still getting some OIII frames but this is coming along.
Binned 25 minute exposures.
The OIII is at f/5
Ha at f/6.3 (from 2010)
Calibrated in DSS,stacked in Pixinsight....which does seem to do a nice job..(!)
Looks too saturated on one monitor and not enough on my laptop..........
Nasty salmon color in the Ha areas.
08-10-13 02
This image is 53 light frames at 120 seconds a piece, 44 dark frames, 33 flat frames, and 50 bias frames. Stacking done in Deep Sky Stacker, and post processing was done in Photoshop.
Equipment:
Omni XLT 150 with CG-4 mount
Modded Canon 350D
T-ring and adapter
Intervalometer
Polar Scope for alignment
- See more at: adirondackastro.com/2013/08/ngc-6888-crescent-nebula/#sth...
This is a close-up of another image I have posted. On this one in the upper left corner one can see the newly discovered planetary nebula called the "Soap Bubble" (no idea why :-). In the lower right corner the Crescent nebula dominates the picture.
Crescent nebula
NGC 6888
This fascinating nebula is generated and illuminated by a large central star which is emitting huge amounts of gas.
This is a Wolf-Rayet star, and the gas is embedded at high velocity , and then runs into older layers of gas further out.
Be sure to zoom in or expand image.
Here's the description from Wikipedia: "The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by Friedrich Wilhelm Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures."
Imaged from Deep Sky West - Rowe New Mexico, using RCOS 14.5 inch Ritchey–Chrétien telescope F/9
Ha: 6 hours
Transparency and seeing very good to excellent, under moonlit skies even full moon for some frames.
September 10-20, 2016
Process in Pixinsight, and Lightroom.
SBIG 16803 CCD,AO-X
Astrodon 5 nm filters
NGC 6888 as seen at the Golden State Star Party.
Taken with the modified Pentax K10D camera on the Stellarvue SV4. Baader Moon and Skyglow filter used.
This is a stack of 58 lights of 10 minutes duration at 400 ISO - best 80% out of 75. A ton of temperature matched darks were used - about 15 or more for each temperature. I found that there were problems with stacking the full frames because of non-optimal centering left uncontrolled or over controlled amp glow at the edges. Removed this issue by doing a custom rectangle and a 2x drizzle.
Rest of the processing in PI was easy - masked stretch and then histogram stretch. Not much else needed. I couldn't get the image solver to work on this image.
I'll be going to RBA's PI workshop on Sunday and maybe I'll learn something.
I reworked the data again...
Same starting point - DSS mosaic stack with a slightly different crop. Things done differently:
1. DBE handled somewhat differently - much broader model with specific data samples in the amp glow area.
2. Masked stretch script run about 600 iterations slowly progressing to a median level of .4
3. Robust star masks built for MT following RBA's directions
4. Didn't brighten the resulting stars.
5. Noise reduction mask built on inverse of the image
6. Slight histogram tweak with this mask in place - served to enhance the dark areas and help brighten some of these small stars.
Everything else is the same.
In the end, I really like this image. It has a nice balance of small stars while still letting the nebulosity show up.
Camera: Hutech modified Canon Rebel XT
Lens: 75-300mm zoom lens (set to 176mm), f/4.5
Exposure: 36x40 seconds, 20 dark frames subtracted.
ISO: 1600
AIP4WIN, MaxDSLR, and Photoshop used for processing.
There are two planetary nebulae in this picture: the bright (and beautiful) Crescent nebula, or NGC 6888, and the much fainter Soap Bubble nebula, which was discovered only two years ago. You can also see a small open cluster, IC 4996. All around the diffuse clouds are made of loose interstellar gas excited by hot stars. All this stuff belongs to the Milky Way and is in constellation Cygnus.
Technical details: 18x5 min in Halpha with a QSI 583 CCD camera, mounted on a TMB80 refractor. I failed to set up the autoguiding. I applied a tonemapping method to the stacked image so as to reveal details of very different brightness.
2024-07-02 0509 UTC
Location: Maryland
Camera: ASI ZWO2600MC
Guide Camera: ASI ZWO290MM
Telescope: Vixen ED80 f/6.5
Mount: Losmandy G11
Integration: 158 minutes (2hrs 38minutes)
Capture used NINA
Post Processing used Pixinsight
Again surprised to be getting much of the emission nebs from the unmod'd Canon DSLR. This was the first night I tried my homebrew lightbox for flats.
This one would benefit from some starfield thinning.
Date: 2012-08-15
Location: PAS Oak Ridge Observatory
Rig: AstroTech 111mm ED triplet refractor
Orion Atlas mount
Orion Mini-guider w/PHD
Canon 40D unmodified
homebrew flats lightbox
Subs: 20 x 3m
Processing: PixInsight
Imaging telescope / lens
Tair Lens 300 mm Tair-3S
Imaging camera
Sony Nex-5N (CMOS) - modified
Mount
Equatorial fork Clestron Evolution
Guiding telescope / lens
Vivitar Lens 135 mm
Guiding camera
ZWO Optical 224MC (CMOS)
Filters
Optolong Multi-Narrowband L-eNhance 2.00"
Processed with
Siril 0.9.10
Photoshop 2020
ISO800
Lights (filter Multi-Narrowband)65 x 200 sec
Total integration time3:36 hours
Subject: NGC6888 -- Crescent Nebula, and parts of IC1318
Image FOV = 3 degrees 20 min (200 min) by 2 degrees 18 min (138 min/2.3 degrees)
Image Scale = 10 arc-second/pixel
Date: 2008/07/05
Location: near Halcottsville, NY
Exposure: 14 x 10 minutes = 2h20m total exposure, ISO800, f/4.8
Filter: Baader 7nm H-alpha filter
Camera: Hutech-modified Canon 30D
Telescope: SV80S 80mm f/6 + TV TRF-2008 0.8X reducer/flattener = 384mm FL, f/4.8
Mount: Astro-Physics AP900
Guiding: ST-402 autoguider and SV66 guidescope. MaximDL autoguiding software using 6-second guide exposures
Processing: Raw conversion and calibration with ImagesPlus (dark frames, bias frames, and flat frames); Aligning and combing with Registar; Gray conversion, levels, curves, cropping/resizing, JPEG conversion with Photoshop CS. No sharpening or noise reduction.
Remarks: Temperature at end: 57F; SQM-L reading 21.45 at start, 21.51 in middle. A small part of IC1318 (part of Gamma Cygnii nebulosity) is visible at the lower left.
9 x 10 min, binned 2x2.
Acquired Maxim DL5, processed Photo shop CS2, Noel Carboni's Actions.
Sky Watcher EQ6 Pro mount. William Optics FLT132mm main scope, Scopos 80mm guide scope. Starlight Xpress SXV M25C camera, SX Lodestar guide camera, Astronomik Hydrogen Alpha filter. Seeing waxing gibbous moon. Staines, Middx,UK.
12-10-08
decon and color work on stars
(not enough,evidently..they are TOO round,and de colorized)
HDR to nebula...
Over the top a bit...neon blue...
Cygnus is a familiar summer constellation. Situated along the plane of our Milky Way galaxy, it is home to many emission nebula, dark nebula and supernova remnants. To the lower left are the North American and Pelican Nebulae. The lower right shows the supernova remnant known as the Veil Nebula. The bimodal nebula at the middle left is the Butterfly Nebula. Smaller nebulae such as the Crescent and Tulip Nebulae are also visible in this image. Link to color version here
Technical details:
Polar alignment wasn't great, so some amount of field rotation is visible. Overall though, I'm pleased with the result.
Imaging scope: Nikon 55mm f/1.8 Lens set to f/4
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-GCalibration and processing in PixInsight.
Ha: 16x5min + 6x3min (1x1)
The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.
Source: Wikipedia
The Crescent Nebula, in Cygnus, is an emission nebula that, as far as I’m concerned, looks like a huge ever growing pulsating brain that rules from the centre of the universe. It was formed ~200,000 years ago when the star at the centre (WR 136) transitioned to the red super giant branch, ejecting its outer Hydrogen shell of roughly 5 solar masses. The stellar wind from the star is ~20 times faster that the expansion of the hydrogen in the nebula which has forced its shell like shape with the UV light from the star is illuminating it.
WR136 is a Wolf-Rayet star, a class that are amongst the most luminous, highest surface temperature and shortest lived stars at ~4.7 million years. It will go supernova within the next few hundred thousand years.
Skywatcher Evo100ED + 0.85 reducer/flattener
Skywatcher HEQ5Pro mount with EQMOD and PHD2 guiding
Altair 60mm guidescope with GPCAM3 385C
Altair Hypercam 294C Pro Tec – Gain @900 , 100 Black level and cooled to -10⁰C
IDAS D2 Light Pollution Suppression Filter
The Crescent Nebula (NGC 6888, Caldwell 27, Sharpless 105): an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.
Imaged August 26, 2017 in bi-color. 3 hours in Hydrogen-alpha (mapped in red channel), and 3-hours in Oxygen-III (mapped in blue and green channels). ES 102mm refractor with 0.8x focal reducer (571mm effective focal length), ZWO ASI 1600 camera at -10C.
Cropped copy of Crescent Nebula. Taken with Orion 80mm ED with Canon T4i, Orion Field Flatner, Astronomik UHC-E filter. Total exposure 2h 50min, each 300s @ISO 1600, BIAS,Dark subtracted. Date: June 30-July01, 2018
3rd night after Full Moon
DeepSkyStacker64 and Photoshop CC for post processing
NGC6888 Crescent Nebula
The Crescent Nebula is an emission nebula about 5000 light-years away and 25 light-years across. It is formed by fast stellar wind from a nearby star energizing slower moving wind previously ejected by the star when it became a red giant about 300,000 years ago. Visually the nebula is a rather faint object which looks like a crescent or Euro-sign in a large telescope, giving it another name: the "Euro Sign Nebula". North is at the top.
Scope/Mount: AstroTech AT8RC 8" F8 Ritchey-Chretien with CCDT67 Focal Reducer / Field Flattener, Celestron CI-700 Mount
Camera: Orion StarShoot Pro V2 one-shot color
Guiding: QHY5L-IIM through Orion Deluxe OAG, PHD guiding software
Exposure: (24) 10 min, dithered
Software: Nebulosity, PhotoShop CS2
Comment: 06-04-16, Tierra del Sol, CA. Light wind, below average seeing.
The Crescent Nebula is an emission nebula in Cygnus.
Image taken through a 300mm F/4 Newtonian telescope with a QHY22 camera. Binned 2x2, Hydrogen-alpha filter, Baader MPCC, auto-guided.
12x300s exposures captured in Nebulosity 3, processed in StarTools.
Orion Eon 80mm
Orion Starshoot V2
CGEM
32 X 8 min
PS Elements
Carboni's tools
This is the best I could do without shooting Ha.
The crescent nebula in Cygnus is a popular and easy target for amateur telescopes. A powerful, yet dying star called a Wolf-Rayet star is responsible for this formation of glowing dust and gas, and will end its life as a supernova.
Takahashi Sky 90 at f/4.5
SBIG STL-4020M (self-guided)
Takahashi EM-200
Hutech LPS Filter
Ha: 5:20 (20 minute subexposures)
Processed in Maxim/DL, ImagesPlus, Registar, and Photoshop
Noel Carboni's Astronomy Tools Actions
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 and are more apparent here in the Halpha image than in the color 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.
Halpha - 6x3min (2x2) per panel
The Crescent Nebula (NGC 6888, Caldwell 27, Sharpless 105): an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.
H-alpha and O-III data collected August 26, and S-II data collected September 3 and 4. 3 hours each channel, for 9 hours total integration. Sulfur-II mapped in Red, Hydrogen-alpha mapped in green, and Oxygen-III mapped in blue. ES 102mm refractor with 0.8x focal reducer (571mm effective focal length), ZWO ASI 1600 camera at -10C.
NGC6888 - The Crescent Nebula
SXVF-H9 with 12nm Ha filter on 80mm APO Refractor, EQ6 SkyScan Mount. 7 images of 600 secs. each, guided, processed in PS.
Average seeing, poor transparency.
11/10/10
Canon EOS 40D (Baader IR Filter)
Astronomik 13nm Ha Filter
Leitz 180/f3.4 @ f4
AstroTrac TT320x
29x 200sec ISO1600
A quick look (24 each minutes in Ha,OIII,SII)
Again puzzled by the lack of SII signal...
Maybe I need another filter to get better 3rd channel data..??
? NII
FOV needs f/6.4,or maybe the f/5 scope...(Newtonian)
Its an ugly thing,IMHO.
I reworked the data again...
Same starting point - DSS mosaic stack with a slightly different crop. Things done differently:
1. DBE handled somewhat differently - much broader model with specific data samples in the amp glow area.
2. Masked stretch script run about 600 iterations slowly progressing to a median level of .4
3. Robust star masks built for MT following RBA's directions
4. Didn't brighten the resulting stars.
5. Noise reduction mask built on inverse of the image
6. Slight histogram tweak with this mask in place - served to enhance the dark areas and help brighten some of these small stars.
Everything else is the same.
In the end, I really like this image. It has a nice balance of small stars while still letting the nebulosity show up.
Some flex still seen, most likely in 102mm scope focuser and/or felt lined rings.
.
Both DEC and RA PHD graphs now have the same appearance. One of the reasons for taking 1800 sec shots is to test a new DEC autoguide motor.
.
One of four subs, all alike, will process next week..
.
Crescent Nebula NGC 6888 1800sec 2 oiii f5_004.fit Cr demosaic autocolor
The red dots are hot pixels on the unprocessed sub. - crop
Total of 3 hours & 10 min exposure.
Manually, off-axis guided for 19 x 10-minutes, f6.3, ISO 1600. Registered and stacked using DeepSkyStacker software.
Unmodified EOS 40D & Celestron C8 telescope.
The Crescent Nebula (NGC 6888) is an expanding shell of energetic gas surrounding a dying star. This image was taken through a Hydrogen-Alpha filter to capture the glow emitted by this gas and the surrounding area.