M24 (Gary Imm) - AstroBin

M24

This object is a star cloud located 10,000 light years away in the constellation of Sagittarius. It is the only star cloud found in the Messier catalog and the second brightest Messier object.

In the night sky, this star cloud appears about nine times larger than the full Moon. It is the densest concentration of individual stars in the night sky. It is an interesting object because, unlike other similar Messier objects, the star cloud is not a single star cluster. Instead, it is comprised of many thousands of stars seen through a unusually clear window in our galaxy's dust lanes. From a dark sky location, it is easily located with the unaided eye as a large hazy patch in the northern portion of the constellation of Sagittarius in the southern summer sky.

There are many interesting designated objects in this field of view. The open cluster of white stars in the upper left of the image is NGC 6603, located in a bright region of the star cloud. This is the only open star cluster I can remember which seems to have far more stars than scientists have identified. Supposedly there are only 30 stars here, but it seems like far more to me.

To the right of the star cluster, at the upper center of the image, is dark nebula Barnard 93. At the bottom of this nebula is star cluster Cr 469. Immediately to the right is another dark nebula, Barnard 92.

The bright red emission area at lower left is Sh2-37. Immediately below are two blue reflection nebulae, VdB 118 and 119. To the right, near the bottom center of the image, is the small but pretty open cluster of white stars designated Markarian 38. Finally, slightly right of this cluster and halfway down to the bottom of the image, is the very small and difficult to see slightly greenish planetary nebula, NGC 6567.

The refractors!
Cloudy Nights
ZWO ASI1600MM/QHY163M

Messier Catalog (Complete)

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Deep sky
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Star trails
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Backyard
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Mix of multiple sources
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Unknown

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Status	Advanced success
Started	...
Astrometry.net job	2189951
PixInsight job	OY58TPV8HY34NQCRE2J50LOAZDNG0T00
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h15m52s.73
RA (top/left)	18h23m43s.31
RA (top/right)	18h13m08s.54
RA (bottom/right)	18h08m01s.100
RA (bottom/left)	18h18m39s.32

Dec (center)	-18°28′57″.9
Dec (top/left)	-18°19′38″.8
Dec (top/right)	-16°44′13″.3
Dec (bottom/right)	-18°37′09″.6
Dec (bottom/left)	-20°13′32″.9

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