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M1 - Crab Nebula ( NGC 1952) in Taurus

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

Details

Discovered 1731 by British amateur astronomer John Bevis and independently rediscovered in 1758 by Charles Messier.

Right Ascension 05 : 34.5 (h:m)
Declination +22 : 01 (deg:m)
Distance 6300 (ly)
Visual Brightness 8.4 (mag)
Apparent Dimension 6'x4'

The Crab Nebula, Messier 1 (M1, NGC 1952), is the most famous and conspicuous known supernova remnant, the expanding cloud of gas created in the explosion of a star as supernova which was observed in the year 1054 AD. It shines as a nebula of magnitude 8.4 near the southern "horn" of Taurus.

Seeing: Good - Pickering 7 rating
Optic(s): Celestron 11" Schmidt Cassegrain + Alan Gee II telecompressor @ f/6.3
Mount: CGE equatorial
Camera: Artemis Art 4021 - monochrome CCD – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomics LRGB Set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: 2011-09-02 UT 02:11:42
Location: Rozhen Observatory, BG, longitude: E 24 44' 19", latitude: N 41 41' 51"
Exposure Details:

L = 20 min, R = 20 min, G = 20 min, B = 20 min, (1x1 binning), Subexposures = 10 min, Total ExposureTime - 80 min

More details: Dark frames reduction
Guiding: Starlight Xpress Lodestar Autoguider on APO 90/600+barlow @ f/13.4
Processing:

PixInsight / PS

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All Contents copyright Velimir Popov unless otherwise noted.