Holmberg II
Holmberg II |
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Object data of Holmberg II |
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| Object type: | galaxy (dwrf Ir) | |
| Size: | 9.3' x 6.6' | |
| Magnitude: | 11.3 mag | |
| Constellation: | UMa | |
| Distance: | 8 Mio Ly | |
| Notes: | Holmberg II (=UGC4305) is an irregular dwarf
galaxy, which is a member of the M81 group of galaxies. It shows several
bright HII regions and many blue stellar complexes, which are a sign of star
forming. The object identification image shows the very distant galaxy cluster J0819+7054 near the top border of the image. The light of this galaxy cluster needs 2.6 billion years to reach earth. |
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Exposure data |
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| Date: | 2008-03-06 + 28 + 30 + 2008-04-05 | |
| 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 23x12m / R 8x12m / G 8x6m / B 8x6m | |
| Exposure time total: | 7h 48m | |
| Notes: | First Deep Light of 12" Newtonian telescope | |
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