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.
| NGC 633 | |
|---|---|
 The galaxy, as seen by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Sculptor |
| Right ascension | 01h 36m 23s |
| Declination | -37° 19’ 18” |
| Apparent magnitude (B) | 13.5 |
| Surface brightness | 22.37 mag/arcsec^2 |
| Characteristics | |
| Type | SBb |
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
editExternal links
editReferences
edit- ^ a b "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. "Southern Binary Galaxies I. A Sample of Isolated Pairs" (PDF). ArXiv. Retrieved July 22, 2024.
- ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-23.
- ^ a b "New General Catalog Objects: NGC 600 - 649". cseligman.com. Retrieved 2024-07-23.