Nightscapes & Deep Sky Colors

Astrophotography Brian A. Morganti

M37 (NGC-2099)

Open Cluster




M37 is the most spectacular of the three open clusters in the constellation of Auriga and contains 1890 stars spread across a region of 20 light-years, at a distance of 4,400 light-years from Earth.  The brilliant orange star near the center is the brightest of about a dozen "red giants" in the cluster, whose visual orange-red color contrasts with the surrounding young blue-white stars when viewed thru my 4" refractor.


  • Date & Location:  January 14, 2010  - Bernville, PA

  • Weather:  Calm, 24F.

  • Sky Conditions:  Patchy cirrus with average transparency. 

  • Optics:  TeleVue NP101is Refractor with 0.8x TeleVue Reducer = 432mm @ f4.3

  • Filter:  Astronomic  EOS clip-in CLS-CCD (Light Pollution Suppression)

  • Mount:  Losmandy G-11 equatorial with Gemini V4

  • Guiding:  Orion Solitaire w/TeleVue TV60is

  • Camera:  Canon T1i (500D) Hap Griffin Modified - Baader UV/IR

  • Exposure:  25 min (2 x 4 min, 5 x 5min) @ ISO 400 RAW

  • Calibration Frames:  No dark frame subtraction (24F)

  • Processing:  Photoshop CS4, Noise Ninja, NIK, Noel Carboni Astronomy Tools

  • Comments:  Background sky was darkened in processing a bit more than usual in order to make the star colors more prominent.  


Astrophotography  -  Nightscapes & Deep Sky Colors