Astronomy:NGC 2305
From HandWiki
| NGC 2305 | |
|---|---|
 NGC 2305 (center) with NGC 2307 (below) imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Volans |
| Right ascension | 06h 48m 37.2674s[1] |
| Declination | −64° 16′ 23.848″[1] |
| Redshift | 0.011671[1] |
| Helio radial velocity | 3499 ± 20 km/s[1] |
| Distance | 173.4 ± 12.2 Mly (53.17 ± 3.75 Mpc)[1] |
| Group or cluster | RR 143 |
| Apparent magnitude (V) | 11.7[1] |
| Characteristics | |
| Type | E2: pec[1] |
| Size | ~188,200 ly (57.71 kpc) (estimated)[1] |
| Apparent size (V) | 2.1′ × 1.5′[1] |
| Other designations | |
| PGC 19641, ESO 087- G 044[1] | |
NGC 2305 is an elliptical galaxy in the constellation of Volans. Its velocity with respect to the cosmic microwave background is 3605 ± 21 km/s, which corresponds to a Hubble distance of 53.17 ± 3.75 Mpc (~174 million light-years).[1] It was discovered by British astronomer John Herschel on 30 November 1834.[2]
The galaxy NGC 2305 forms a physical pair with NGC 2307, collectively named RR 143, with a distance of at least 51 kpc between the galaxies.[3]
Supernovae
Two supernovae have been observed in NGC 2305:
- SN 2011fn (Type I, mag 17.9) was discovered by Stu Parker on 29 June 2011.[4] There is some uncertainty about this supernova; it was classified as either Type Ia or Type Ic, and it is possible that the host galaxy of this supernova was not NGC 2305, but instead the nearby galaxy 2MASS J06483060-6415588.[5]
- SN 2023txv (Type Ia, mag 17.409) was discovered by ATLAS on 3 October 2023.[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 2305". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+2305.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 2305". https://cseligman.com/text/atlas/ngc23.htm#2305.
- ↑ Trinchieri, G.; Rampazzo, R. (2001). "ROSAT-HRIobservations of six southern galaxy pairs". Astronomy & Astrophysics 374 (2): 454. doi:10.1051/0004-6361:20010750. Bibcode: 2001A&A...374..454T.
- ↑ "SN 2011fn". IAU. https://www.wis-tns.org/object/2011fn.
- ↑ Bock, G.; Parker, S.; Drescher, C. (2011). "Supernova 2011fn near NGC 2305 = PSN J06483496-6415545". Central Bureau Electronic Telegrams (2814): 1. Bibcode: 2011CBET.2814....1B. http://www.cbat.eps.harvard.edu/iau/cbet/002800/CBET002814.txt.
- ↑ "SN 2023txv". IAU. https://www.wis-tns.org/object/2023txv.
External links
- NGC 2305 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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