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| NGC 3642 | |
|---|---|
 NGC 3642 as taken by Mount Lemmon SkyCenter | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 22m 17.9s[1] |
| Declination | 59° 04′ 28″[1] |
| Redshift | 1571 ± 3 km/s[1] |
| Distance | 27 ± 35 Mly (8.4 ± 10.7 Mpc)[1] |
| Apparent magnitude (V) | 10.8 |
| Characteristics | |
| Type | SA(r)bc[1] |
| Apparent size (V) | 1.8′ × 1.5′[1] |
| Other designations | |
| UGC 6385, MCG +10-16-128, PGC 34889[1] | |
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NGC 3642 is a spiral galaxy in the constellation Ursa Major. The galaxy has a low-ionization nuclear emission-line region. It is located at a distance of circa 30 million light years from Earth, which, given its apparent dimensions, means that NGC 3642 is about 50,000 light years across. The galaxy is characterised by an outer pseudoring, which was probably formed after the accretion of a gas rich dwarf galaxy.[2]
- ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 3642. Retrieved 2016-01-18.
- ^ Verdes–Montenegro, L.; Bosma, A.; Athanassoula, E. (1 July 2002). "Star formation in the warped outer pseudoring of the spiral galaxy NGC 3642". Astronomy & Astrophysics. 389 (3): 825–835. arXiv:astro-ph/0205088. Bibcode:2002A&A...389..825V. doi:10.1051/0004-6361:20020680. S2CID 14707377. Retrieved 17 July 2017.