NGC 3840 is a spiral galaxy[2] located about 320 million light-years away[3] in the constellation Leo.[4] The galaxy was discovered by astronomer Heinrich d'Arrest on May 8, 1864.[5] NGC 3840 is a member of the Leo Cluster.[6][7][8] The galaxy is rich in neutral atomic hydrogen (H I) and is not interacting with its environment.[9]
NGC 3840 | |
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Observation data (J2000 epoch) | |
Constellation | Leo |
Right ascension | 11h 43m 58.9s[1] |
Declination | 20° 04′ 37″[1] |
Redshift | 0.024590[1] |
Heliocentric radial velocity | 7372 km/s[1] |
Distance | 318 Mly (97.5 Mpc)[1] |
Group or cluster | Leo Cluster |
Apparent magnitude (V) | 14.54[1] |
Characteristics | |
Type | Sa[1] |
Size | ~105,400 ly (32.32 kpc) (estimated)[1] |
Apparent size (V) | 1.1 x 0.8[1] |
Other designations | |
CGCG 97-91, IRAS 11413+2021, MCG 3-30-70, PGC 36477, UGC 6702[1] |