IC 10

Full resolution (1600x1200 px  0.8MB)

150 % resolution (1.4MB)

OSC widefield image

Object data of IC10

Object type: galaxy (dIrr)
Size: 6.8' x 5.9'
Magnitude: 10.4 mag
Constellation: Cas
Distance: 2.2 Mio Ly
Notes: IC 10 is an irregular dwarf galaxy in the constellation Cassiopeia. It was discovered in 1887 and its membership in the Local Group of galaxies was finally confirmed in 1996. This galaxy is the only known starburst galaxy in the Local Group of galaxies. Despite its closeness, the galaxy is rather difficult to study because it lies near the plane of the Milky Way and so IC 10 is heavily obscured by interstellar matter. You can see some dust in the OSC widefield image. The dense dark nebula complex around vdB 1 can be found  in the neighbourhood in a distance of only 80'.

IC 10 is surrounded by a faint halo, as can be seen clearly in the above image. This circular halo has a diameter of more than 12', what nearly doubles the apparent size in visible light, known from literature.

IC 10 is even bigger. This galaxy has a huge envelope of hydrogen gas, with an apparent size measuring 68′ 80′.

Exposure data

Date: 2011-12-26 + 27 + 2012-01-12 + 16 + 18 + 26 + 2012-02-20 + 21 + 22
Location: Nussbach / Austria (400m)
Telescope: 12" Newtonian telescope (f=1120mm)
Camera: ST2000XM with CFW8 and Baader Filters
Binning: L 1x1 / RGB 1x1
Exposure time: L 44x12m / R 11x12m / G 11x12m / B 11x12m
Exposure time total: 15h 24m