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Ultracompact dwarf galaxy that is the densest galaxy known From Wikipedia, the free encyclopedia
M85-HCC1 is an ultracompact dwarf galaxy with a star density 1,000,000 times that of the solar neighbourhood,[3][2] lying near the galaxy Messier 85. As of 2015[update], it is the densest galaxy known.[4]
M59-UCD3 | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Coma Berenices |
Right ascension | 12h 25m 22.842s[1] |
Declination | +18° 10′ 53.67″[1] |
Heliocentric radial velocity | 658 ± 4[2] |
Apparent magnitude (V) | 18.80 ± 0.03[2] |
Absolute magnitude (V) | −12.55 ± 0.07[2] |
Characteristics | |
Mass | (1.2±0.1)×107[2] M☉ |
Half-light radius (physical) | 1.85 ± 0.9 pc[2] |
Other designations | |
2MASS J12252287+1810539, SDSS J122522.84+181053.6[1] |
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