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