I Zwicky 18

I Zwicky 18
Hubble Space Telescope (HST) image of I Zwicky 18
Credit: HST/NASA/ESA
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension09h 34m 02.0s
Declination+55° 14′ 28″
Redshift751 ± 2 km/s
Distance0.059 Gly
Apparent magnitude (V)16.0
Characteristics
TypeI, Starburst Galaxy
Apparent size (V)0.3′ × 0.2′
Other designations
UGCA 166, Mrk 116, PGC 27182

I Zwicky 18 is a blue compact dwarf galaxy located about 59 million light years away in the constellation Ursa Major. The galaxy was first identified by Swiss astronomer Fritz Zwicky in a 1930s photographic survey of galaxies.

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