NGC7142 & IC5134/NGC7129

Image information:

Date: 8/10/2008
Equipment: SBIG ST2000XM with CFW10 and Astronomik type 2c LRGB filter set through WO ZS105ED telescope on Losmandy GM8 mount. WO ZS105ED working at f7.
Image type: LRGB
Exposure time: 11X8min Luminance binned 1X1, RG&B 6X5min each binned 2X2

Object information:

Object designations:

  • NGC7142
  • NGC7129
  • IC5134
Object type:
  • NGC7142 - Open cluster
  • NGC7129 - Open cluster (associated with IC4134)
  • IC5134 - Reflection nebula
Object size:
  • NGC7142 - 12'
  • NGC7129 - 7.5'
  • IC5134 - 7.5'
Constellation: Cepheus

IC5134 and associated cluster NGC7129 are situated in the area of our galaxy abundant with interstellar gas and dust. Many of the stars belonging to NGC7129 are not visible in normal light because they are obscured by nebula surrounding them. But, they are obvious in infrared images. IC5134 is a turbulent star forming region. In that nebula there are many already formed young stars, as well as protostars (not yet completely formed stars). Strong radiation and jets of ionized gas from young stars and protostars interacting with surrounding matter create interesting shapes and colors of the IC5134. IC5134 is 3300 ly distant.

Although quite close on the image, NGC7142 is much more distant than IC5134/NGC7129. NGC7142 is some 5500 ly distant. Foreground dust reddens the light from NGC 7142, which makes studying the cluster rather difficult. In any case, NGC7142 is an example of an older cluster while NGC7129 is a very young open cluster (about 1 million years old).

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