Astronomy:NGC 7253
| NGC 7253 | |
|---|---|
| File:250px The spiral galaxy pair NGC 7253 by the Pan-STARRS survey. | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus |
| Right ascension | 22h 19m 28.9s[1] |
| Declination | 29° 23′ 30.0″[1] |
| Redshift | 0.015738[1] |
| Helio radial velocity | 4718 km/s[1] |
| Distance | 203.7 Mly (62.46 Mpc) & 200.4 Mly (61.43 Mpc)[1] |
| Apparent magnitude (V) | 13.2 & 14.3[1] |
| Characteristics | |
| Type | Double System[1] |
| Size | ~135,000 ly (41.40 kpc) & 71,400 ly (21.88 kpc) (estimated)[1] |
| Apparent size (V) | 1.7' x 0.8' & 1.6' x 0.5'[1] |
| Other designations | |
| Arp 278, UGC 11984 & 11985, MCG+05-52-010 & +05-52-011, PGC 68572 & 68573[1] | |
NGC 7253 is a pair of spiral galaxies in the constellation Pegasus. It was discovered by the German-British astronomer Albert Marth on 9 September 1863.[2] It is listed in Halton Arp's Atlas of Peculiar Galaxies as Arp 278, as an example of gravitationally interacting galaxies.[3]
Of the pair, the galaxy to the north is known individually as NGC 7253A. Its velocity relative to the cosmic microwave background is 4,235 ± 24 km/s, which corresponds to a Hubble distance of 62.5 ± 4.4 Mpc (~204 million light-years).[1] The other galaxy in the pair is known individually as NGC 7253B. Its velocity relative to the cosmic microwave background is 4,165 ± 24 km/s, which corresponds to a Hubble distance of 61.4 ± 4.3 Mpc (~200 million light-years).[1]
With a surface brightness equal to 14.06 Mag/arcsec2, NGC 7253B can be described as a low surface brightness galaxy.
According to the Simbad database, NGC 7253 is a candidate for the title of active galaxy nucleus.[4]
One supernova has been observed in NGC 7253B: SN 2002jg (Type Ia, mag. 17) was discovered by Mike Schwartz and LOTOSS (Lick Observatory and Tenagra Observatory Supernova Searches) on 23 November 2002.[5][6]
Image Gallery
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NGC 7253 imaged by the Hubble Space Telescope (data processing by Judy Schmidt).
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 1.11 "NASA/IPAC Extragalactic Database". Results for NGC 7253. http://ned.ipac.caltech.edu/byname?objname=NGC+7253.
- ↑ Courtney Seligman. "Celestial Atlas Table of Contents, NGC 7250 - 7299". http://cseligman.com/text/atlas/ngc72a.htm#7253..
- ↑ Arp, Halton (1966). "Atlas of Peculiar Galaxies". The Astrophysical Journal Supplement Series 14: 1. doi:10.1086/190147. Bibcode: 1966ApJS...14....1A.
- ↑ SIMBAD entry for NGC 7253 Retrieved 17 July 2024.
- ↑ Ganeshalingam, M.; Li, W.; Schwartz, M. (2002). "Supernova 2002jg in NGC 7253". International Astronomical Union Circular (8022): 2. Bibcode: 2002IAUC.8022....2G. http://www.cbat.eps.harvard.edu/iauc/08000/08022.html#Item2.
- ↑ "SN 2002jg". IAU. https://www.wis-tns.org/object/2002jg.
External links
- NGC 7253 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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