NGC 632

NGC 632
NGC 632 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationPisces
Right ascension01h 37m 17.5512s
Declination+05° 52′ 38.550″
Redshift0.010567±0.0000200
Heliocentric radial velocity3,168±6 km/s
Distance125.65 ± 6.74 Mly (38.525 ± 2.066 Mpc)
Group or clusterNGC 645 Group (LGG 28)
Apparent magnitude (V)12.4
Characteristics
TypeS0
Size~62,100 ly (19.05 kpc) (estimated)
Apparent size (V)1.0′ × 0.8′
Other designations
IRAS 01346+0537, 2MASX J01371753+0552389, UGC 1157, MCG +01-05-010, Mrk 1002, PGC 6007, CGCG 412-008

NGC 632 is a lenticular galaxy in the constellation of Pisces. Its velocity with respect to the cosmic microwave background is 2,868±22 km/s, which corresponds to a Hubble distance of 138.0 ± 9.7 Mly (42.30 ± 2.98 Mpc). However, eight non-redshift measurements give a closer mean distance of 125.65 ± 6.74 Mly (38.525 ± 2.066 Mpc). It was discovered by British astronomer John Herschel on 24 September 1830.

NGC 632 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.

NGC 632 has a nucleus which shines in the ultraviolet range, and is thus listed in Markarian's catalogue as Mrk 1002.

NGC 645 Group

NGC 632 is a member of the NGC 645 group (also known as LGG 28). This group has 5 galaxies, including NGC 638, NGC 645, UGC 1137 [d], and UGC 1172 [d].

Supernova

One supernova has been observed in NGC 632:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 "Results for object NGC 632". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 23 March 2026.
  2. 1 2 "Distance Results for NGC 632". NASA/IPAC Extragalactic Database. NASA. Retrieved 23 March 2026.
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 632". Celestial Atlas. Retrieved 23 March 2026.
  4. ↑ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D.; Davies, R. I.; Hönig, S. F.; Ricci, C.; Rosario, D. J.; Salvato, M.; Shankar, F.; Stern, D. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society. 494 (2): 1784. arXiv:2003.05959. Bibcode:2020MNRAS.494.1784A. doi:10.1093/mnras/staa766.
  5. ↑ "NGC 632". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 23 March 2026.
  6. ↑ Markarian, B. E.; Lipovetskii, V. A.; Stepanian, D. A. (1977). "Galaxies with ultraviolet continuum. XI". Astrofizika. 13: 397. Bibcode:1977Afz....13..397M.
  7. ↑ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
  8. ↑ "LGG 28". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 23 March 2026.
  9. ↑ Halderson, E.; Modjaz, M.; Shefler, T.; King, J. Y.; Papenkova, M.; Li, W. D.; Treffers, R. R.; Filippenko, A. V.; Nakano, S.; Kushida, R.; Kushida, Y. (1998). "Supernova 1998es in NGC 632". International Astronomical Union Circular (7050): 1. Bibcode:1998IAUC.7050....1H.
  10. ↑ "SN 1998es". Transient Name Server. IAU. Retrieved 23 March 2026.