Astronomy:NGC 1620
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| NGC 1620 | |
|---|---|
 NGC 1620 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 04h 36m 37.3764s[1] |
| Declination | −00° 08′ 36.81″[1] |
| Redshift | 0.011715[1] |
| Helio 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′ × 1.0′[1] |
| Other designations | |
| IRAS 04340-0014, 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
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. 18.57) was discovered by the Gaia Photometric Science Alerts on 1 March 2023.[5]
NGC 1589 Group
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
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 1620". NASA and Caltech. http://ned.ipac.caltech.edu/byname?objname=NGC+1620.
- ↑ "Distance Results for NGC 1620". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+1620.
- ↑ Pignata, G.; Maza, J.; Hamuy, M.; Antezana, R.; Gonzalez, L.; Gonzalez, P.; Lopez, P.; Silva, S. et al. (2009). "Supernova 2009K in NGC 1620". Central Bureau Electronic Telegrams (1663): 1. Bibcode: 2009CBET.1663....1P. http://www.cbat.eps.harvard.edu/cbet/001600/CBET001663.txt.
- ↑ "SN 2009K". IAU. https://www.wis-tns.org/object/2009K.
- ↑ "SN 2023crx". IAU. https://www.wis-tns.org/object/2023crx.
- ↑ 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
- NGC 1620 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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