Astronomy:NGC 809
From HandWiki
| NGC 809 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 04m 18.97s[1] |
| Declination | −08° 44′ 07.08″[1] |
| Redshift | 0.017812[1] |
| Helio radial velocity | 5,340 km/s[1] |
| Distance | 261 Mly |
| Characteristics | |
| Type | (R)S0^+?[1] |
| Size | ~108,500 ly (33.27 kpc) (estimated)[1] |
| Other designations | |
| MCG -02-06-023, PGC 7889, 6dF J0204190-084407[1] | |
NGC 809 is a lenticular galaxy located in the constellation Cetus about 249 million light-years away from the Milky Way.[2] The redshift of the galaxy is (z) 0.017[1] and it was first discovered by the American astronomer named Lewis Swift in November 1886.[3]
Supernovae
Two supernovae have been observed in NGC 809:
- SN 2006ef (Type Ia, mag. 15.6) was discovered by the Lick Observatory Supernova Search (LOSS) on 18 August 2006.[4][5]
- SN 2025yn (Type II, mag. 18.978) was discovered by ATLAS on 21 January 2025.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "NED Search results for NGC 809". https://ned.ipac.caltech.edu/byname?objname=NGC+809&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1.
- ↑ "New General Catalog Objects: NGC 800 - 849". https://cseligman.com/text/atlas/ngc8.htm#809.
- ↑ "New General Catalog Objects: NGC 800 - 849". https://cseligman.com/text/atlas/ngc8.htm#809.
- ↑ Puckett, T.; Peoples, M.; Joubert, N.; Madison, D. R.; Mostardi, R.; Khandrika, H.; Li, W.; Foley, R. J. (2006). "Supernovae 2006ed-2006en". International Astronomical Union Circular (8741): 1. Bibcode: 2006IAUC.8741....1P. http://www.cbat.eps.harvard.edu/iauc/08700/08741.html#Item1.
- ↑ "SN 2006ef". IAU. https://www.wis-tns.org/object/2006ef.
- ↑ "SN 2025yn". IAU. https://www.wis-tns.org/object/2025yn.
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