LDN 1251 (Gary Imm)

LDN 1251

This molecular cloud is located 1150 light years away in the constellation of Cepheus at a declination of +75 degrees. It spans almost 2 degrees in our apparent view. This corresponds to a width of 30 light years.

This object is the 1251st object in the Lynds Dark Nebulae catalogue. The Lynds Dark Nebulae are named after US astronomer Beverly Turner Lynds who published a catalog of 1802 dark nebulae in 1962. I like this statement from her paper - "In order to facilitate the computation of the galactic co-ordinates and the statistical analysis of the clouds, each entry in the table was entered on IBM punched cards." I experienced the tail end of the infamous punch card era, and I have an appreciation for her work that I wouldn't have otherwise.

The dust is reflecting the light of nearby bright stars as well as obscuring many of the background stars. This object has the nickname of the Rotten Fish Nebula, which, like most nicknames, I do not like. Thoughts of rotten fish and beautiful space objects don’t go together in my opinion.

I love the curving, unusual shape of this molecular cloud. As with most of these clouds, little information is available on this object. The cloud has an interesting red emission glow, especially towards the bottom.

A number of Herbig-Haro (HH) objects are seen throughout the nebula as tiny white wisps. These HH objects are bright patches of nebulosity around newborn stars, formed when jets of gas ejected by the young stars collide with surrounding clouds of gas and dust.

Several background galaxies can be seen through the edges of the nebula, including UGC 12160 at the left edge and LEDA 166755 at upper right. LEDA 166755 is about 80,000 light years in diameter and 140 million light years away, over 100,000 times further away than the nebula.

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Description: HH Objects

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Status	Advanced success
Started	...
Astrometry.net job	8376767
PixInsight job	HQZGSNFX8BOTZPG699KG7K6D176697UV
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h27m16s.98
RA (top/left)	22h53m26s.10
RA (top/right)	22h01m59s.42
RA (bottom/right)	22h04m09s.50
RA (bottom/left)	22h49m23s.70

Dec (center)	+75°13′34″.6
Dec (top/left)	+76°03′42″.6
Dec (top/right)	+76°10′00″.5
Dec (bottom/right)	+74°13′34″.6
Dec (bottom/left)	+74°08′04″.0

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LDN 1251

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