M60-UCD1

M60-UCD1
A picture of M60-UCD1 taken by the Hubble Space Telescope
Observation data (J2000.0 epoch)
Constellation	Virgo
Right ascension	12h 43m 35.976s[1]
Declination	11° 32m 4.92s[1]
Redshift	0.004263±0.0[2]
Heliocentric radial velocity	1,278±0 km/s[2]
Galactocentric velocity	1,229±2 km/s[2]
Distance	48.60 ± 3.262 Mly (14.9 ± 1.0 Mpc)h−1 0.6774 (Comoving)[2]
Group or cluster	M60 Group
Apparent magnitude (V)	14.2[1]
Characteristics
Mass	(2.0±0.3)×108 (dynamical mass)[1] M☉
Size	158 ± 3.26 ly (48.4 ± 1.0 pc) (Half-light diameter)[1]
Half-light radius (physical)	78.9 ± 1.63 ly (24.2 ± 0.5 pc)[1]
Other designations
M60-UCD1, SDSS J124335.96+113204.6[3]
References: [3]

M60-UCD1 is an ultracompact dwarf galaxy. It is 49 million light years from Earth, close to Messier 60 (M60, NGC 4649) in the Virgo Cluster. Half of its stellar mass is in the central sphere 160 light years in diameter.^[4]