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Ultra-compact dwarf galaxy in the constellation of Virgo From Wikipedia, the free encyclopedia
M59-UCD3 is an ultra-compact dwarf galaxy located near the Messier 59 galaxy. As of 2015[update], it is the second-densest galaxy currently observed, second to M85-HCC1.[1][3]
| M59-UCD3 | |
|---|---|
Images of two ultracompact dwarf galaxies. M59-UCD3 is in the inset to the left, while M85-HCC1 is in the inset to the right. | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 42m 11.041s[1] |
| Declination | +11° 38′ 41.21″[1] |
| Heliocentric radial velocity | 373 ± 18[1] |
| Apparent magnitude (V) | 16.34 ± 0.05[1] |
| Absolute magnitude (V) | −14.60 ± 0.09[1] |
| Characteristics | |
| Mass | (1.8±0.3)×108[1] M☉ |
| Half-light radius (physical) | 20 ± 4 pc[1] |
| Other designations | |
| SDSS J124211.04+113841.2[2] | |
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