Holmberg II

Holmberg II is a dwarf galaxy in the constellation Ursa Major. Its apparent magnitude is 11,1^m and it is 11 million light years away from Earth. The galaxy is dominated by huge glowing gas bubbles, which are regions of star formation.^[2]

Holmberg II
An image of Holmberg II, NASA/JPL-Caltech/K. Gordon (STScI), SINGS
Observation data (J2000 epoch)
Constellation	Ursa Major
Right ascension	08^h 19^m 04.98^s ^[1]
Declination	+70° 43′ 12.1″ ^[1]
Redshift	0.000474 ± 0.000003 ^[1]
Distance	11.06 Mly
Apparent magnitude (V)	11.10 ^[1]
Characteristics
Type	Im ^[1]
Apparent size (V)	7′.9 × 6′.3 ^[1]
Other designations
UGC 4305, PGC 23324, MCG +12-8-33, IRAS 08140+7052, Arp 268, DDO 50, Holmberg II, KUG 0814+708^[1]

Holmberg II also hosts an ultraluminous X-ray source. One hypothesis suggests that is caused by an intermediate mass black hole that is pulling surrounding material.^[2]

Holmberg II was discovered by Erik Bertil Holmberg.

References

1. "NASA/IPAC EXTRAGALACTIC DATABASE". Data for Holmberg II. Retrieved 2008-09-19.
2. "Galaxy caught blowing bubbles". Retrieved 29 September 2011.

External links

•   Media related to Arp 268 at Wikimedia Commons