Whirlpool Galaxy (M51A/B or NGC 5194/5). Credit: NASA/ESA
Observation data (J2000 epoch)
Constellation Canes Venatici[1]
Right ascension 13h 29m 52.7s[2]
Declination +47° 11′ 43″[2]
Redshift 463 ± 3 km/s[2]
Distance 23 ± 4 Mly (7.1 ± 1.2 Mpc)[3]
Type SA(s)bc pec[2]
Apparent dimensions (V) 11′.2 × 6′.9[2]
Apparent magnitude (V) 8.4[4]
Notable features Interacting with NGC 5195[5]
Other designations
Question Mark Galaxy,[2] Rosse's Galaxy,[2] M51a,[2] NGC 5194,[2] UGC 8493,[2] PGC 47404,[2] VV 001a,[2] VV 403,[2] Arp 85[2]
