M82 in Ursa Major

 

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Description: Sometimes called the "Exploding Galaxy", M82 is thought to have been seriously distorted by the passing of M81, nearby.  This  exposure shows the S-shape that resulted from that encounter.  The emissions above and below the galactic plane are clearly visible.  NW is up.
 
Exposure Data: 1/19/2003.  (L+R)RGB: 8x10mL, 7x10mR, 6x4mG, 6x7mB. GB binned 2x2. -20C, .49 arc-sec./pixel.
 
Processing: Acquired via Sequencer II (dither 3) and CCDSoft, reduced and aligned, in Mira, Combined in Sigma, L 2x CCDSharp, DDP in Maxim, LRGB combine, curves, levels and other processing in Photoshop.
 
Optical System: 12.5 Ritchey-Chretien RCOS Truss @ F/9, ST-10XME NABG/CFW-8A CCD camera, Paramount ME.  AO7 guided.
 
Comments: FWHM's were around 2.7 arc-sec., deconvolved to 2.1 arc-sec.  Previous versions linked here.