Location of Photo:
Date/Time of photo:
November 28 - December 28, 2013
Telescope: TEC-140 (F7) Camera: SBIG ST-8300M Mount: AP900 GTO HA: 18x30 minutes (binned 1x1) SII: 24x30 minutes (binned 1x1) OIII: 24x30 minutes (binned 1x1)
This is a picture of Abell 21, also known as the medusa nebula. It was taken with narrowband filters Ha, SII, and OIII. This is a planetary nebula about 1,500 light years away in the constellation Gemini.