Sh2 187 (Jerry Yesavage)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD7458 · HD7720 · HD7829 · HD8570 · HD8769 · HD9056 · HD9136 · HD9154 · HD9167 · LBN 630 · LDN 1312 · LDN 1313 · LDN 1314 · LDN 1316 · LDN 1317 · LDN 1319 · LDN 1322 · LDN 1323 · LDN 1324 · Sh2-187

Sh2 187

Another Sharpless2 object that is seen in the context of the surrounding H-alpha clouds thanks to the CMOS chip and stretching optimized with GHS.

GHS Forum Discussion

2015 Takahashi 180 ED Image:

Sh2 187 in H-alpha and RGB

From GalaxyMap:

This young (100-200 thousand years) star formation region is most likely ionised by a B0 class star and is surrounded by a 4600 solar mass molecular cloud. It is partially obscured by the Lynds dark nebula LDN 1317 and contains the infrared star cluster [BDS2003] 52.

Russeil lists three potential ionising stars, one with a B2.5V class.

GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>

There are 313 Sh2 objects. All now imaged.

This is my collection:

Sharpless2

Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171

Please note there is also a Sharpless2 Group with now more than 2700 examples.

Sharpless2 Group

Other useful links include:

Gary Imm's Collection

GalaxyMap's Collection

The Sharpless Catalog

The MDW H-alpha Sky Survey

Reiner Vogel's detailed observing catalog

Hope you enjoy these obscure but interesting objects...

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Sharpless2 Objects

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Distribution of astrophotographers

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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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Unknown

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	Advanced success
Started	...
Astrometry.net job	6570909
PixInsight job	0RH5VCL2RZ3CXYUI64EEUQSY0EK1YMSO
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h23m00s.584
RA (top/left)	01h14m05s.907
RA (top/right)	01h31m49s.350
RA (bottom/right)	01h32m20s.800
RA (bottom/left)	01h13m47s.378

Dec (center)	+61°50′58″.80
Dec (top/left)	+61°08′07″.96
Dec (top/right)	+61°06′57″.45
Dec (bottom/right)	+62°31′34″.33
Dec (bottom/left)	+62°32′46″.30

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Sh2 187

Sh2 187

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Sh2 187

Sh2 187

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