M35 and NGC2158

Image information:

Date: 01/26/08
Equipment: SBIG ST2000XM with CFW8a and Astronomik type 2c LRGB filter set through WO ZS105ED telescope on Losmandy GM8 mount. WO ZS105ED working at f5.6 with WO 0.8X reducer/flattener.
Image type: LRGB
Exposure time: 10X4min Luminance binned 1X1, RG&B 6X3min each binned 2X2.

Object information:

Object designations:

  • M35, NGC2168
  • NGC2158
Object type:
Pair of open clusters
Object size:
  • M35 28'
  • NGC2158 5'
Constellation: Gemini
M35 consists of more than 500 stars in diameter of 24 ly. M35 is relatively young (some 150 million years old) and diffuse cluster. It is dominated by bluish young stars. M35 is 2800 ly distant. NGC2158 is quite different from M35. It is ten times older, 16 kly distant and contains many more stars in the similar volume as M35. It's very concentrated for an open cluster. It contains mostly older, yellow stars.

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