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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.
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Technical Details: |
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| 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 |