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NGC 633

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NGC 633
The galaxy, as seen by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationSculptor
Right ascension01h 36m 23.4128s[1]
Declination−37° 19′ 17.647″[1]
Redshift0.017305[1]
Heliocentric radial velocity5188 ± 11 km/s[1]
Apparent magnitude (B)13.5
Surface brightness22.37 mag/arcsec²
Characteristics
TypeSB(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

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References

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  1. ^ a b c d e f g h "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-23.
  2. ^ 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.
  3. ^ "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-23.
  4. ^ a b "New General Catalog Objects: NGC 600 - 649". cseligman.com. Retrieved 2024-07-23.