M 40, NGC 4284, NGC 4290, PGC 39934


Messier 40 (M40) is one of the three unusual objects in Messier's catalog. It is a double star, which was also cataloged later as Winnecke 4 (WNC 4). Most probably, it is an optical double star. The bright star at the left bottom is a 5,5 mag. SAO 28346. Three galaxies are seen at about six o'clock from M 40. In order of distance from M 40 they are: the 17,4 mag PGC 39934, 12 mag. NGC 4290 and 13,6 mag NGC 4284.


Technical Details:

Optics: ASA N 12 Astrograph at /6.8
Mount: ASA DDM 85
Camera: SBIG STL-11000M
Filters: Astronomik LRGB filter set
Dates/Times: 28 April 2012
Location: Rozhen
Exposure Details: L = 10 min, R = 10 min; G = 10 min; B = 10 min.
Subexposures: 2 minutes
Acquisition: CCD Soft
Processing: PixInsight, Photoshop CS

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