Medusa Nebula | Kjell H. Winnem

Kjell H. Winnem
Location of photo
Date/Time of photo
March 3&7 2010
Homebuilt 10 inch Newtonian and mount in dome. Cam.:Meade DSI Pro II guided off-axis with modified ToUcam 840K Pro II and PHD,GPUSB interface to mount. Exp.:H-a 3x60min, SII 60min, OIII 60min, CFHT-palette. Processing:Nebulosity2 and PS CS3.
The Medusa Nebula is a very old and large planetary in Gemini,also known as Abell 21. As it is so big,its surface brightness is very low,with surface magnitudes of between +16 and +25 reported. The Medusa was discovered i 1955, and until the early 1980s it was thought to be a supernova remnant.
All comments must follow the Sky & Telescope Terms of Use and will be moderated prior to posting. Please be civil in your comments. Sky & Telescope reserves the right to use the comments we receive, in whole or in part, and to use the commenter’s username, in any medium. See also the Terms of Use and Privacy Policy.


This site uses Akismet to reduce spam. Learn how your comment data is processed.