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I agreeImaging telescope or lens:Skywatcher Esprit 80 ED Triplet Super Apo
Imaging camera:ZWO ASI 183 MM PRO
Mount:SkyWatcher NEQ6 Pro Goto
Guiding telescope or lens:Skywatcher Esprit 80 ED Triplet Super Apo
Guiding camera:Astrolumina Alccd5L-IIc
Focal reducer:Skywatcher Field flattener for Esprit 80mm
Software:PHD2 Guiding, FitsWork 4, DeepSky Stacker Deep Sky Stacker 3.3.4, Adobe PhotoShop CS5, Seqence Generator Pro
Filters:Baader B 1.25'' CCD Filter, Baader G 1.25'' CCD Filter, Baader R 1.25'' CCD Filter
Accessory:TSOptics TS Off Axis Guider - 9mm
Resolution: 5423x3599
Dates:Oct. 10, 2018
Frames:
Baader B 1.25'' CCD Filter: 84x60" (gain: 53.00) -20C bin 1x1
Baader G 1.25'' CCD Filter: 84x60" (gain: 53.00) -20C bin 1x1
Baader R 1.25'' CCD Filter: 84x60" (gain: 53.00) -20C bin 1x1
Integration: 4.2 hours
Darks: ~31
Flats: ~27
Avg. Moon age: 1.43 days
Avg. Moon phase: 2.31%
Astrometry.net job: 2304993
RA center: 2h 20' 30"
DEC center: +57° 7' 44"
Pixel scale: 1.199 arcsec/pixel
Orientation: 3.160 degrees
Field radius: 1.084
Locations: Nürnberg, Nürnberg, Bayern, Germany
Data source: Backyard
Object description (wikipedia.org):
The Double Cluster (also known as Caldwell 14) is the common name for the open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. Both visible with the naked eye, NGC 869 and NGC 884 lie at a distance of 7500 light years. NGC 869 has a mass of 3700 solar masses and NGC 884 weighs in at 2800 solar masses; however, later research has shown both clusters are surrounded with a very extensive halo of stars, with a total mass for the complex of at least 20,000 solar masses. Based on their individual stars, the clusters are relatively young, both 12.8 million years old. In comparison, the Pleiades have an estimated age ranging from 75 million years to 150 million years. There are more than 300 blue-white super-giant stars in each of the clusters. The clusters are also blueshifted, with NGC 869 approaching Earth at a speed of 39 km/s (24 mi/s) and NGC 884 approaching at a similar speed of 38 km/s (24 mi/s).[5] Their hottest main sequence stars are of spectral type B0.
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