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Observatory Parameters
Dec 14
Lat. 39.0, Lon. -77.5
Clouds: Seeing:
Waning Crescent
03:46 14:54
Narrow band image (S II, S II, Ha II, O III) from 37 light frames totaling one hour and 19 minutes, 7 flats of 60 seconds each and 7 dark frames of 3 minutes each. Sulfur assigned to the Red channel, Oxygen to Blue and Hydrogen to Green
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Orion Nebula, Astrophotography by Catman46


  • Imaging telescope / lens: Celestron Schmidt-Cassegrain (SCT) 9inches
  • Imaging camera: SBIG STF=8300M (CCD)
  • Mount: Equatorial Celestron CGEM
  • Filters: Astronomik H-alpha (Narrowband Hydrogen Alpha)
    Astronomik SII (Narrowband Sulfur 2)
    Astronomik OIII (Narrowband Oxigen 3)
  • Accessories: Focal reducer Celestron .63X

Frames / Subs

  • Lights: 37 x 125 sec
  • Darks: 7 x 180 sec
  • Flats: 7 x 60 sec
  • Total integration time: 1:45 hours


  • Date: Mon Feb 13th 2017
  • Camera sensor temperature: -20.0 ºC
  • Binning: 2x2

Spatial Info

  • Image Size: 1,446 x 1,080 pixels
  • Image Scale: 1.919 arcsec / pixel
  • Visual Field: 0º 46' 14''
  • RA Center: 5h 35m 01s
  • DEC Center: -5º 32' 16''
  • Orientation: -93.553 degrees E of N

Sky Maps


Astronomy Quote of the Day

“The Cosmos is all that is or ever was or ever will be. Our feeblest contemplations of the Cosmos stir us — there is a tingling in the spine, a catch in the voice, a faint sensation, as if a distant memory, or falling from a height. We know we are approaching the greatest of mysteries.” Carl Sagan
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