M7 & Barnard 287 (Gary Imm)

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: B287 · M 7 · NGC 6475 · Ptolemy cluster

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M7 & Barnard 287

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M7 & Barnard 287

This image captures 2 objects side by side. Barnard 287 is the dark nebula on the right side of the image, located in the constellation of Scorpius at a declination of -35 degrees. I could not find a distance estimate for this nebula, but if it is close to the typical distance of around 1500 light years, the object is about 10 light years long. To me, the nebula resembles the Burning Man logo.

Of course, the star of the show here is the bright mag 3.3 M7 open cluster of 80 stars, the most southerly Messier object in the night sky. This object is relatively close at 1000 light-years.

This object was first recorded in 130 AD by Greek-Roman astronomer Ptolemy and in recognition of this early observation, M7 is often referred to as Ptolemy's Cluster. If you live far enough south to see it, M7 stands out even to the naked eye as a bright cluster of stars to rival the Pleiades, the bright cluster in the northern winter sky. Unlike the Pleiades, M7 is silhouetted against almost the dead center of the galaxy, which means it has a sparkling diffuse backdrop of dense stars. The yellow giant star to the lower left, the only non-bluish main star in the cluster, is the brightest star in the cluster.

Dark Nebula
ZWO ASI183/QHY183
The refractors!
Cloudy Nights
Open Star Clusters
Takahashi Refractors

Barnard Catalog (140/369)
Dark Nebulae
Messier Catalog (Complete)
Open Clusters

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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.

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Status	Advanced success
Started	...
Astrometry.net job	2899190
PixInsight job	ZWX84APFRPAEUKOYOTG5VO0LJ9YB47VO
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	17h54m15s.251
RA (top/left)	17h52m49s.710
RA (top/right)	17h53m19s.537
RA (bottom/right)	17h55m41s.333
RA (bottom/left)	17h55m10s.409

Dec (center)	-34°56′56″.74
Dec (top/left)	-34°36′54″.70
Dec (top/right)	-35°21′03″.39
Dec (bottom/right)	-35°16′55″.74
Dec (bottom/left)	-34°32′51″.14

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M7 & Barnard 287

M7 & Barnard 287

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M7 & Barnard 287

M7 & Barnard 287

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