Abell 2256

Full resolution (1600x1200 px  430kB)

Object data of Abell2256

Object type: galaxy cluster
Size: 140'
Magnitude: brightest galaxy: 15.4 mag
Constellation: UMi
Distance: 750 Mio Ly

Abell 2256 is a collection of more than 500 galaxies 750 million light years distant and 10 million light years across. X-ray images show a double structure near the center of this cluster, which indicates the merging of two clusters. Newer publications found hints for a third cluster component.

The brightest members of Abell2256 are: NGC6331 and UGC10726.

Exposure data

Date: 2008-07-27 + 28 + 31
Location: Nussbach / Austria (400m)
Telescope: 12" Newtonian telescope (f=1139mm)
Camera: ST2000XM with CFW8 and SBIG Filters
Binning: L 1x1 / RGB 2x2
Exposure time: L 29x12m / R 10x12m / G 10x6m / B 10x6m
Exposure time total: 9h 48m