| UGC4305 / Galaxy, type Dwarf Irr |
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| R.A. | 08h 19m 12.3s (2000.0) |
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| Dec. | +70°43' 15" (2000.0) |
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| Apparent Size | 7.9×6.2' |
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| Radial Velocity | +157km/s |
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| Magnitude | 11.1 |
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| Distance | 11 millions light yrs. |
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| Group of Galaxies | M81 Group |
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| Other IDs | CGCG 331-34, Arp 268
MCG +12-8-33, DDO 50
IRAS 8140+7052, PGC 23324 |
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UGC4305 is an irregular galaxy lying at the northwest edge of Ursa Major. You can find the galaxy out by tracing 10 degrees north from omicron Uma at the nose tip of the Big Bear.
The galaxy, called "Holmberg II" from a discoverer, has a size of 8 arc minutes and a brightness of 11th magnitude.
The galaxy contains interstellar gaseous matters abundantly and the star-forming is actively proceeding.
And an intensive X-ray source has been discovered in the galaxy.
Holmberg II is a member of galaxy group with M81 and M82 (Bode's galaxies) at 8 degrees east, and is estimated as 110 thousand light years away.
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