NGC 1620
| NGC 1620 | |
|---|---|
 The spiral galaxy NGC 1620 | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 04h 36m 37.3764s[1] |
| Declination | −00° 08′ 36.81″[1] |
| Redshift | 0.011715[1] |
| Heliocentric radial velocity | 3512 ± 1 km/s[1] |
| Distance | 166.2 ± 11.6 Mly (50.97 ± 3.57 Mpc)[1] |
| Group or cluster | NGC 1589 Group (LGG 117) |
| Apparent magnitude (V) | 12.3[1] |
| Characteristics | |
| Type | SAB(rs)bc[1] |
| Size | ~121,000 ly (37.11 kpc) (estimated)[1] |
| Apparent size (V) | 2.9' x 1.0'[1] |
| Other designations | |
| IRAS 04340-0014, 2MASX J04363734-0008370, UGC 3103, MCG +00-12-052, PGC 15638[1] | |
NGC 1620 is an intermediate spiral galaxy in the constellation of Eridanus. Its velocity with respect to the cosmic microwave background is 3,455 ± 4 km/s, which corresponds to a Hubble distance of 166.2 ± 11.6 Mly (50.97 ± 3.57 Mpc).[1] However, 20 non-redshift measurements give a closer distance of 130.02 ± 3.26 Mly (39.865 ± 1.001 Mpc).[2] It was discovered by German-British astronomer William Herschel on 1 January 1786.
Supernovae
[edit]Two supernovae have been observed in NGC 1620:
- SN 2009K (type IIb, mag. 14.9) was discovered by CHASE (CHilean Automatic Supernovas sEarch) on 14 January 2009.[3][4]
- SN 2023crx (type Ib, mag. 18.6) was discovered by the Gaia Photometric Science Alerts on 1 March 2023.[5]
NGC 1589 Group
[edit]According to A.M. Garcia, the galaxy NGC 1620 is part of the NGC 1589 Group (also known as LGG 117) that includes at least 8 other galaxies: NGC 1586, NGC 1587, NGC 1588, NGC 1589, UGC 3054, UGC 3058, UGC 3072 and UGC 3080.[6]
See also
[edit]References
[edit]- ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for NGC 1620. Retrieved 24 July 2024.
- ^ "Distance Results for NGC 1620". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 13 December 2024.
- ^ Pignata, G.; Maza, J.; Hamuy, M.; Antezana, R.; Gonzalez, L.; Gonzalez, P.; Lopez, P.; Silva, S.; Folatelli, G.; Iturra, D.; Cartier, R.; Forster, F.; Marchi, S.; Conuel, B.; Reichart, D.; Ivarsen, K.; Crain, A.; Foster, D.; Nysewander, M.; Lacluyze, A. (2009). "Supernova 2009K in NGC 1620". Central Bureau Electronic Telegrams. 1663: 1. Bibcode:2009CBET.1663....1P.
- ^ "SN 2009K". Transient Name Server. IAU. Retrieved 13 December 2024.
- ^ "SN 2023crx". Transient Name Server. IAU. Retrieved 13 December 2024.
- ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
External links
[edit]
Media related to NGC 1620 at Wikimedia Commons- NGC 1620 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
