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 |
| Declination | −37° 19′ 17.647″ |
| Redshift | 0.017305 |
| Heliocentric radial velocity | 5188 ± 11 km/s |
| Apparent magnitude (B) | 13.5 |
| Surface brightness | 22.37 mag/arcsec2 |
| Characteristics | |
| Type | SB(r)b: |
| Other designations | |
| MCG -06-04-056, PGC 5960 | |
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). 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.
The smaller galaxy to the south of NGC 633 is PGC 5959 or ESO 297-012, and these two galaxies form a galactic pair. The Hubble distance of ESO 297-012 is 73.51 ± 5.15, which is almost identical to that of NGC 633, confirming that both galaxies are in gravitational interaction. A contrast-enhanced image shows a bridge of matter between these two galaxies.
See also
External links
References
- 1 2 3 4 5 6 7 8 "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-23.
- ↑ 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". ned.ipac.caltech.edu. Retrieved 2024-07-23.
- 1 2 "New General Catalog Objects: NGC 600 - 649". cseligman.com. Retrieved 2024-07-23.