Helix Nebula NGC 7293
- a large object with low surface brightness it is the closest known planetary nebula to us (~700ly). Radiation emitted by the extremely hot dying star in the centre causes many shells of gas previously blown off by the star to fluoresce producing the observed colours.
|Camera:||SBIG STL11000M, Astrodon filters||Scope:||Takahashi TOA-130, f=1000mm, f7.7 (fov (cropped) ~0.6°x0.5°)|
|Mount:||Takahashi EM-200 Temma2||Guiding:||External (E-finder)|
|Filters/Exposures:||L:R:G:B = 2x15:2x15:2x15:2x15min ≡ 2h00m||Location:||LMDSS Heathcote, Victoria, Australia|
|Date:||October 2010||Processing:||CCDStack2, MIRA AL8 and Photoshop CS5 (reprocessed Sept 2012)|