NGC147 & NGC185

Image information:

Date: 08/04/2016
Equipment: QSI583wsg with internal filter wheel and Astrodon E series Gen II LRGB filter set through AT65EDQ telescope on Losmandy GM8 mount.
Image type: LRGB
Exposure time: 10X8min Luminance binned 1X1, RG&B 10X8min each binned 2X2

Object information:

Object designations:

  • NGC147, Caldwell 17
  • NGC185, Caldwell 18
Object type:
Dwarf Elliptical Galaxies
Object size:
  • NGC147 - 13' X 8'
  • NGC185 - 8' X 7'
Constellation: Cassiopeia

NGC 147 and 185 are both Dwarf Elliptical galaxies, characterized by spherical form and not much detail. They form a binary system in a stable orbit around our galactic neighbor M31, the Andromeda galaxy. That makes them members of our Local Group of galaxies. Because of their dimensions they are classified as dwarf galaxies. NGC147 has dimensions of 7,5 kly X 11 kly, while NGC185 has diameter of some 7,8 kly. That is not much compared to M31 which is some 250 kly across. They are about 2.2 Mly distant.

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