M39 Open Star Cluster (Mark Germani)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: HD204917 · HD205073 · HD205085 · HD205116 · HD205117 · HD205198 · HD205210 · HD205331 · LBN 416 · LDN 1006 · LDN 1009 · LDN 1012 · M 39 · NGC 7092

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M39 Open Star Cluster

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M39 Open Star Cluster

While waiting for the >50% moon and astronomical twilight to pass, I decided to spend some time on a star cluster found near the area of sky I'm currently working on (Cygnus). I purposefully kept my exposures short to try and keep the stars from blowing out entirely, with the histogram about 1/5 from the bottom. I captured NGC 7082 as well, but opted not to include it in this crop, so as to focus on M39. Perhaps I'll load the full field as a revision, if anyone is curious.

M39 is one of the brightest and closest star clusters in the Messier catalogue (only Pleiades & Beehive are closer) and curiously enough contains only blue stars!

Original
Final
C

C

Description: Revised original, pulled back the luminosity on some of the core stars and increased saturation.

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Status	Advanced success
Started	...
Astrometry.net job	4708441
PixInsight job	YVAKSZ2TPY1VDECDERVSTCL12E1CUASX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h31m45s.74
RA (top/left)	21h27m30s.62
RA (top/right)	21h27m33s.15
RA (bottom/right)	21h35m49s.85
RA (bottom/left)	21h36m09s.25

Dec (center)	+48°28′02″.5
Dec (top/left)	+49°31′18″.5
Dec (top/right)	+47°25′09″.10
Dec (bottom/right)	+47°24′14″.3
Dec (bottom/left)	+49°30′17″.1

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M39 Open Star Cluster

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