Abell 21 The Medusa Nebula

Photographer
Kjellw
Email
kjell.winnem@gmail.com
Location of photo
Hof, Norway
Date/Time of photo
Feb 25-27 2016
Equipment
Homebuilt 10-inch Newtonian f/4 and mount in dome. Cam.:SXVR-H9 guided off-axis with DSI-Pro2. Exp.:Ha 2x60m,SII 2x60m,OIII 2x60m,all bin2x2. HST-palette.
Description
This dim planetary nebula, discovered in 1955,was until the early 1970s thought to be a supernova remnant. Distance 1500 ly.
Website
kjell.winnemonline.com