object | Medusa nebula, Abell 21 |
constellation | Gemini |
equipment | ASA Astrograph 10" at f/2,8, Astro modified Canon EOS 40D, EOS Clip Filter H-Alpha 12nm |
exposure | 15 x 600 sec at 800 ASA unguided |
date | Nov 27 2009 Engelhardsberg Germany |
conditions | dust, moon, stars to 4m0 |
image processing | DeepSkyStacker 3.3.2, Photoshop CS4, PixInsight 1.6 |