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M38 (NGC 1912, Starfish Cluster), Open Cluster in Auriga

LRGB combination (Click for a larger view 1800 x 1800 px)

Details

M38 (NGC 1912, Starfish Cluster), Open Cluster in Auriga

Discovered by Giovanni Batista Hodierna before 1654 and independently found by Le Gentil in 1749.

M38 is considered an intermediately rich open cluster about 220 million years old. M38 is still young enough to house many bright blue stars, although it's brightest star is a yellow giant shining 900 times brighter than our Sun. The cluster spans roughly 25 light-years and lies about 4200 light-years away.

North is up. The Horizontal FOV is about 38' (slight crop from original FOV). The image almost centered at:

Right Ascension 05:28:43 (h:m:s)
Declination +35:51:18 (deg:m:s)
Distance 4.2 (kly)
Visual Brightness B=6.69, V=6.4 (mag)
Apparent Dimension 20 (arc min)

Optic(s): RC 12" with Astro-Physics corrector @ f/5
Mount: ASA DDM85 Premium
Camera: ATIK 4000 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomik LRGB set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: 2012-10-21
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

L = 6 min, R = 6 min, , G = 6 min, , B = 6 min, subs. 3 min, Bin 1, Total Exposure Time - 24 min

More details: Dark and flat frames reduction
Guiding: All subexposures are unguided
Processing:

PixInsight / PS

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All Contents copyright Velimir Popov unless otherwise noted.