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Image Equipment Details
Exposure Details
Software Used
  • Rancho Del Sol Observatory, Camino, Ca
  • RCOS 20" Truss F8.3
  • Paramount ME
  • Apogee Alta U09000
  • SBIG ST402 Guider
  • Astrodon MegaMoag off axis guider
  • Astrodon 2nd Generation 50mm Square Filters
  • 6 Filter Image
  • Red = 40 minutes
  • Blue = 40 minutes
  • Green = 40 minutes
  • Ha = 540
  • SII = 0
  • OIII = 600
  • CCDAP 4
  • MaxDL 5
  • Pinpoint
  • Thesky 6
  • Pempro
  • CCDstack2 / CCDIS
  • Photoshop CS5
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Medusa Nebula (Abell 21) with Ha mapped to Orange and OIII Mapped to Blue

Mouse over to see the Medusa in "Natural" Color
Medusa Natural Color