NGC 957 - open cluster in Perseus

  Size: 1800 px      
© Velimir Popov & Emil Ivanov 2018

NGC 957 is a little populated and poorly concentrated cluster in the constellation Perseus. Its distance is estimated at around 1815 parsec (5920 light years), and thus it falls on the internal edge of the Perseus Arm, in the same region where are the great system of nebulas IC 1805 and IC 1848, as well as the more prominent Double Cluster. All studies agree to give this object a very young age. According to some it would have formed about 11 million years ago, while according to others its formation should not date back more than 4 million years ago. It contains several massive blue stars, among which stand out two Be stars. The real diameter of NGC 957 corresponds to about 4.4 parsecs.


Image details:


Center of field RA 02:32:46 (h:m:s)
Center of field DE +57:35:40 (deg:m:s)
Size 1.89 x 1.27 (deg)
Pixel scale: 1.77 (arcsec/pixel)
Orientation: Up is 246 degrees E of N
Charts and image details obtained from
Optic(s): ASA 12" Astrograph @ f/3.6 (Newton)
Mount: ASA DDM85 Standard
Camera: SBIG STL 11000 M
Filters: Red, Green, Blue, Astronomik filters
Dates/Times: 14 Sep. 2018
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: R:4x5 min, G:4x5 min, B:4x5 min, Bin 1, Total Exposure Time - 60 min.
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2013 - 2018. All Rights Reserved
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