NGC-869/884 The Double Cluster of Persei (Steve Argereow)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 7 Per) · 7 chi Per · Double cluster · HD13841 · HD13854 · HD13890 · HD13900 · HD13910 · HD13969 · HD13970 · HD14012 · HD14039 · HD14051 · HD14052 · HD14053 · HD14092 · HD14134 · HD14143 · HD14162 · HD14186 · HD14210 · HD14250 · HD14270 · HD14330 · HD14357 · HD14422 · HD14433 · HD14434 · HD14443 · HD14476 · And 11 more.

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NGC-869/884 The Double Cluster of Persei

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NGC-869/884 The Double Cluster of Persei

I Imaged this in North Carolina just before "Tropical Storm Ian" hit.
I've been wanting to image it and it's bright and only about an hour imaging time
could yield good results. I knew there would be no imaging for about a week so
it was the right time to go for it!

NGC 869 and NGC 884 are two bright Open Clusters in Perseus, that are separated by
only half a degree of apparent sky. Together they are commonly known as the "Double Cluster".   Both
clusters have been known since antiquity and probably pre-historically. Greek astronomer Hipparchus
first catalogued them around 130 B.C, with early celestial cartographers naming them as "h Persei"
(NGC 869) and "χ Persei" (NGC 884). Recent data measurements put the distances of NGC 884 and
NGC 869 at 7,600 and 6,800 light-years respectively.  Both clusters are extremely young and spatially
close to each other. It's estimated that NGC 869 is 5.6 million years old and NGC 884 is 3.2 million
years old. For comparison, the Pleiades M45 open cluster is 115 million years old. In total, NGC 869
and NGC 884 contain at least 400 hot blue-white supermassive and super luminous giant stars.

Information Credits: Home free star charts

Telescope: Explorer Scientific 127mm CF APO Refractor f/7.5 (952mm Focal Length)
Explore Scientific X0.7 Reducer f/5.25 (667mm Focal Length)
Mount IOptron CEM40
Camera ZWOASI6200MC-Pro Temp -10C, Binning 1 x 1, Gain 100 Offset 50
ZWO EFW
44 X 90 Second Exposures W/Optolong L-Extreme Filter (6nm)

30 Dark Frames/30 Flats
Total Integration Time: 1 Hour 6 Minutes
Acquisition with SharpCap
Stacked with Astro Pixel Processor
Guiding PHD2
Processed with Astra Image

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Status	Advanced success
Started	...
Astrometry.net job	6366117
PixInsight job	RURAHP1IBQ17TEIR9HFUH0Y8VKEP7AKK
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h20m25s.53
RA (top/left)	02h23m13s.73
RA (top/right)	02h15m24s.53
RA (bottom/right)	02h17m43s.27
RA (bottom/left)	02h25m21s.11

Dec (center)	+57°08′16″.9
Dec (top/left)	+57°47′37″.2
Dec (top/right)	+57°28′23″.1
Dec (bottom/right)	+56°28′45″.2
Dec (bottom/left)	+56°47′26″.5

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NGC-869/884 The Double Cluster of Persei

NGC-869/884 The Double Cluster of Persei

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NGC-869/884 The Double Cluster of Persei

NGC-869/884 The Double Cluster of Persei

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