NGC 4638 Sloan Digital Sky Survey image of NGC 4638. Observation data (J2000 epoch) Constellation Virgo Right ascension 12h 42m 47.4s[1] Declination 11° 26′ 33″[1] Redshift 0.003843[1] Helio radial velocity 1152 km/s[1] Distance 50.77 Mly (15.565 Mpc)[1] Group or cluster Virgo Cluster Apparent magnitude (V) 12.1[1] Characteristics Type S0[1] Size ~42,800 ly (13.13 kpc) (estimated)[1] Apparent size (V) 2.17 x 1.27[1] Other designations NGC 4667, CGCG 70-229, CGCG 71-6, MCG 2-32-187, PGC 42728, UGC 7880, VCC 1938[1]