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	08h 19m 04.98s [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

External links

• Media related to Arp 268 at Wikimedia Commons

На других языках

[de] UGC 4305