Sharpless SH2-112 Emission Nebula (niteman1946)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg)

Sharpless SH2-112 Emission Nebula, niteman1946

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Sharpless SH2-112 Emission Nebula

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Sharpless SH2-112 Emission Nebula

Sh2 -112 is an emission nebula visible in the constellation of Cygnus .

It is located in the northern part of the constellation, about 1.5 ° to WNW of the bright star Deneb.

The best time of observation in the evening sky falls between the months of July and December and the best locations for viewing are in the northern hemisphere.

The nebula is an H II region with a circular apparent size of about 15 ', crossed by a dark band on its western side oriented north-south. It is believed that the excitement star responsible is BD + 45 3216, a blue double star of the spectral class O8V with an apparent magnitude of 9.18. Estimates on the distance of this star provide a value of 1740 parsecs (about 5670 light years ), and that would place Sh2-112 in a region of the particularly rich Orion Arm and physically very close to the great Cygnus X system. [Source: Wikipedia.It]

The image was captured with the venerable Meade 12"LX200 Classic, using the Atik 383L+ mono at F7.16 (i.e. 2182mm FL). Astronomik's Ha, OIII and SII narrow band filters were used. All subs were taken at 1x1 bin, and -10C and 10 minutes each.

Image information -- 2016

Ha : 50 subs (8.33 hr) on Jul 20th, 23rd and 24th.

OIII : 24 subs (4.00 hr) on Jul 21st and 22nd.

SII : 27 subs (4.50 hr) on Jul 21st and 22nd.

Color Mix:

Ha = Red

S2 = Grn

O3 = Blu

Processing was with PixInsight, following (for the most part) kayronjm's tutorial of Feb. 24th, 2013. Ha was used to develop the Luminance image. Ha, OIII and SII were collected for the color mix. North is up, and this is a slight crop.

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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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
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	Basic success
Started	...
Astrometry.net job	1165642
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Sharpless SH2-112 Emission Nebula

Sharpless SH2-112 Emission Nebula

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