Open Cluster M67 (NGC 2682), type 'f', in Cancer

LRGB combination - spikes added (Click for a larger view 1200 x 1200 px)



Open Cluster M67 (NGC 2682), type 'f', in Cancer

Messier 67 (M67, NGC 2682) is one of the oldest known open clusters, and by far the oldest of Messier's open clusters, being aged at 3.2 billion years in the Star Catalogue 2000.0; Mallas/Kreimer quote an even higher, but probably outdated value of 10 billion years. New estimates of G. Meynet's Geneva Team indicate an age of 4.0 billion years. Note: This is still less than the age of our Solar System, but open clusters usually get destructed much faster. It has been calculated that M67 can expect to exist as a cluster for about another 5 billion years. According to Cecilia Payne-Gaposhkin, M67 contains nearly 200 white dwarfs.(text adapted from

Discovered before 1779 by Johann Gottfried Koehler.

Right Ascension 08 : 50.4 (h:m)
Declination +11 : 49 (deg:m)
Distance 2.7 (kly)
Visual Brightness 6.1 (mag)
Apparent Dimension 30.0 (arc min)

Seeing: Pickering 8 rating - Good to Excellent
Optic(s): Celestron 11" Schmidt Cassegrain + TS2" flattener @ f/8
Mount: ASA DDM85 Premium
Camera: ATIK 4000 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomics L, R, G, B set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: 2012-04-24
Location: Rozhen Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

L = 8 min, R = 8 min, G = 8 min, B = 8 min, (Bin 1), Subexposures = 2 min, Total Exposure Time - 32 min

More details: Dark and flat frames reduction
Guiding: All subexposures are unguided thanks to ASA DDM85 Premium mount

PixInsight / PS


All Contents copyright Velimir Popov unless otherwise noted.