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.
|Optics:||ASA N 12 Astrograph at /6.8|
|Mount:||ASA DDM 85|
|Filters:||Astronomik LRGB filter set|
|Dates/Times:||28 April 2012|
|Exposure Details:||L = 10 min, R = 10 min; G = 10 min; B = 10 min.|
|Processing:||PixInsight, Photoshop CS|