Abell 2390

Full resolution (1600x1200 px  680kB)

150% resolution (1MB)

B/W image with galactic cirrus

OSC widefield image

Object data of Abell2390

Object type: galaxy cluster
Size: 20'
Magnitude: 17.6 mag (brightness of 10th brightest member)
Constellation: Peg
Distance: 2.6 Billion Ly
Notes: Abell 2390 is a distant galaxy cluster in constellation Pegasus, which is well known because of it's gravitational arcs captured by the Hubble Space Telescope. The above image does not show any hints of these arcs, but it unveils another interesting phenomenon: A faint nebula, which fills nearly the complete image field. The author assumes that this nebula is a part of the galactic cirrus.

Exposure data

Date: 2012-08-17+18+19+20 + 2012-09-08+09+16
Location: Nussbach / Austria (400m)
Telescope: 12" Newtonian telescope (f=1120mm)
Camera: ST2000XM with CFW8 and Baader Filters
Binning: L 1x1 / RGB 1x1
Mount: WAM 650move
Exposure time: L 69x12m / R 19x12m / G 19x12m / B 19x12m
Exposure time total: 25h 12m