Astronomy:NGC 633
| NGC 633 | |
|---|---|
 The galaxy, as seen by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Sculptor |
| Right ascension | 01h 36m 23.4128s[1] |
| Declination | −37° 19′ 17.647″[1] |
| Redshift | 0.017305[1] |
| Helio radial velocity | 5188 ± 11 km/s[1] |
| Apparent magnitude (B) | 13.5 |
| Characteristics | |
| Type | SB(r)b:[1] |
| Other designations | |
| MCG-06-04-056, PGC 5960[1] | |
NGC 633 is a large barred spiral galaxy located in the constellation Sculptor. Its speed relative to the cosmic microwave background is 4,979 ± 18 km/s, which corresponds to a Hubble distance of 73.4 ± 5.2 Mpc (~239 million ly).[1] NGC 633 was discovered by British astronomer John Herschel in 1834.
The luminosity class of NGC 633 is II and it has a broad HI line. It also contains regions of ionized hydrogen.[1]
The smaller galaxy to the south of NGC 633 is PGC 5959 or ESO 297-012, and these two galaxies form a galactic pair.[2] The Hubble distance of ESO 297-012 is 73.51 ± 5.15,[3] which is almost identical to that of NGC 633, confirming that both galaxies are in gravitational interaction.[4] A contrast-enhanced image shows a bridge of matter between these two galaxies.[4]
See also
External links
- NGC 633 at NASA/IPAC
- NGC 633 at SIMBAD
- NGC 633 at SEDS
- NGC 633 at LEDA
- NGC 633 at WikiSky
- NGC 633 at Seligman
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "By Name | NASA/IPAC Extragalactic Database". http://ned.ipac.caltech.edu/byname?objname=NGC+633&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1.
- ↑ Soares, D. S. L.; de Souza, R. E.; de Carvalho, R. R.; Couto da Silva, T. C. (1994). "Southern Binary Galaxies. I. A Sample of Isolated Pairs". arXiv:astro-ph/9410092.
- ↑ "By Name | NASA/IPAC Extragalactic Database". https://ned.ipac.caltech.edu/byname?objname=ESO+297-G+012&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1.
- ↑ 4.0 4.1 "New General Catalog Objects: NGC 600 - 649". https://cseligman.com/text/atlas/ngc6.htm.
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