Imaging telescope or lens: Takahashi TOA-130
Imaging camera: Starlight Xpress H694 Mono CCD
Mount: Astro-Physics Mach 1 GTO
Guiding telescope or lens: Takahashi TOA-130
Guiding camera: Starlight Xpress Lodestar
Focal reducer: TOA-645 Super Reducer
Integration: 12.0 hours
Avg. Moon age: 18.47 days
Avg. Moon phase: 84.75%
Astrometry.net job: 191217
RA center: 112.231 degrees
DEC center: 13.276 degrees
Orientation: -96.008 degrees
Field radius: 0.596 degrees
Locations: San Jose, CA, San Jose, California, United States
The Medusa Nebula (or Abell 21) is a planetary nebula in a distance of 1,500 lightyears in the constellation Gemini. It was discovered fairly recently (1955) and it was first thought to be a supernova remnant. It has its name from the braided serpentine filaments of glowing gas which look like the serpent hair of the Medusa (from the Greek Mythology).
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