NGC-6857 an Emission Nebula in SHO and HSO (Steve Argereow)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: HD189806 · HD189846 · HD189918 · HD190001 · HD190192 · HD190336 · HD190382 · HD190430 · HD226953 · HD226959 · HD226974 · HD226975 · HD226976 · HD226977 · HD226987 · HD227006 · HD227007 · HD227008 · HD227024 · HD227028 · HD227030 · HD227040 · HD227063 · HD227064 · HD227075 · HD227076 · HD227095 · HD227096 · HD227097 · HD227098 · And 70 more.

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NGC-6857 an Emission Nebula in SHO and HSO

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NGC-6857 an Emission Nebula in SHO and HSO

NGC-6857 is an emission nebula in Cygnus around 30,000 Light-Years
distant. This is a layered image in Hubble SHO 75% with HSO 25%

Telescope: Explorer Scientific 127mm CF APO Refractor f/7.5 (952mm Focal Length)
Explore Scientific X0.7 Reducer f/5.25 (667mm Focal Length)
Mount IOptron CEM40
Camera ZWOASI1600MM-Pro Temp -15C, Binning 1 x 1, Gain 139 Offset 21
ZWO EFW

61 X 240 Second Exposures W/ZWO Ha Filter (7nm)
51 X 240 Second Exposures W/ZWO SII Filter (7nm)
46 X 240 Second Exposures W/Astrodon OIII Filter (3nm)

20 Dark Frames/30 Flats
Total Integration Time: 10 Hours 34 Minutes
Stacked with APP
Acquisition with SharpCap
Guiding PHD2
Processed with Astra Image/GIMP
Photo taken from Seven Lakes, NC Bortle 4.5

Original
Final
B

North Carolina Astronomers
SharpCap Users
AstroBin Platform open discussions community forum

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	8851578
PixInsight job	UV52508AKSHJPPK5SRZYRGIM7Q0SKJW5
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h01m41s.70
RA (top/left)	19h58m40s.34
RA (top/right)	19h59m59s.99
RA (bottom/right)	20h04m40s.12
RA (bottom/left)	20h03m23s.94

Dec (center)	+33°30′54″.8
Dec (top/left)	+33°58′27″.6
Dec (top/right)	+32°49′22″.4
Dec (bottom/right)	+33°03′04″.4
Dec (bottom/left)	+34°12′20″.8

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NGC-6857 an Emission Nebula in SHO and HSO

NGC-6857 an Emission Nebula in SHO and HSO

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NGC-6857 an Emission Nebula in SHO and HSO

NGC-6857 an Emission Nebula in SHO and HSO

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