NGC 129

NGC 129

NGC 129 (Cr2) is a galactic cluster in Cassiopeia
Magnitude: 6.5v
Trumpler Classification: III2m
Apparent Size: 21'
Distance: 5,300 ly
Physical size: 30 ly.
Age: 80 Mil. Yrs.

Although a young cluster, a few stars have already reached the supergiant stage. One of these DL Cassiopeia (the bright yellow/orange star left and down from the center of the image) is also a Cepheid variable and is used to refine distance measurements to the cluster.

Date acquired: October 27, 2013
Camera: Starlight Xpress SXVF-H9
Guider: Starlight Xpress Exview
Scope: Astrotech AT10RC @ F8 (2000mm)
Mount: Losmandy Titan w/Gemini-II
Filters: Astronomik R, G & B type 2c.
Exposures: R,G,B = 10 x 90 seconds each.
Acquired, calibrated, stacked (avg) and RGB combined in Astroart 5
F.O.V. = 15.5' x 11.6' @ 0.66 arc"/Pixel

Processing Notes:
Normalized with Green background.
Post combine Log stretch.
Boosted color saturation by 70%
Applied a Gaussian blur.