Crab Nebula

The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in theconstellation of Taurus. Corresponding to a bright supernova recorded by Chinese astronomers in 1054, the nebula was observed later by English astronomer John Bevis in 1731. At an apparent magnitude of 8.4, comparable to that of the largest moon of Saturn, it is not visible to the naked eye but can be made out using binoculars under favourable conditions.

At X-ray and gamma ray energies above 30 keV, the Crab is generally the strongest persistent source in the sky, with measured flux extending to above 10 TeV. Located at a distance of about 6,500 light-years (2 kpc) from Earth, the nebula has a diameter of 11 light years (3.4 pc, corresponding to an apparent diameter of some 7 arc minutes) and expands at a rate of about 1,500 kilometers per second (0.5% c). It is part of the Perseus Arm of the Milky Way galaxy.

Imaging telescopes or lenses: Ian King Ikharos 8″ RC
Imaging cameras: Atik 460 EX
Mounts: Software Bisque Paramount MX
Guiding telescopes or lenses: Ian King Ikharos 8″ RC
Guiding cameras: Atik 314L+
Software: PixInsight, Software Bisque CCDSoft 5, Software Bisque TheSkyX, iLanga AstroPlanner, Matt Thomas’s CCDCommander
Filters: Baader H-alpha 7nm 36mm, Baader Luminance 36mm, Baader OIII 8,5nm 36mm, Baader Red, Green, Blue 36mm, Baader SII 8nm 36mm
Accessories: Atik EFW2, Innovations Foresight On-axis guider
Dates: Nov. 23, 2013
Frames: 121×600″
Integration: 20.2 hours

Author: Colin McGill
AstroPhotography of the day by SPONLI 1 Oct 2014