NGC 7645

NGC 7645
NGC 7645 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationSculptor
Right ascension23h 23m 47.3070s
Declination−29° 23′ 17.083″
Redshift0.023086±0.00000900
Heliocentric radial velocity6,921±3 km/s
Distance318.6 ± 22.3 Mly (97.68 ± 6.84 Mpc)
Apparent magnitude (V)13.77
Characteristics
TypeSB(r)c
Size~205,600 ly (63.04 kpc) (estimated)
Apparent size (V)1.4′ × 1.2′
Other designations
ESO 470- G 003, 2MASX J23234727-2923170, MCG -05-55-007, PGC 71314

NGC 7645 is a barred spiral galaxy in the constellation of Sculptor. Its velocity with respect to the cosmic microwave background is 6,623±21 km/s, which corresponds to a Hubble distance of 318.6 ± 22.3 Mly (97.68 ± 6.84 Mpc). It was discovered by British astronomer John Herschel on 27 September 1834.

Pair of galaxies

The galaxy pair NGC 7636 and NGC 7645

According to Soares and colleagues, NGC 7645 and NGC 7636 [fr] form a galaxy pair with a probability of 0.57. The Hubble distance to NGC 7636 is 323.1 ± 22.7 Mly (99.06 ± 6.96 Mpc), which is close to that of NGC 7645. The galaxies are separated by an angular distance of 17.4′.

Supernovae

Two supernovae have been observed in NGC 7645:

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 "Results for object NGC 7645". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 1 October 2026.
  2. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 7645". Celestial Atlas. Retrieved 1 October 2026.
  3. ↑ Soares, D. S. L.; De Souza, R. E.; De Carvalho, R. R.; Couto Da Silva, T. C. (1995). "Southern binary galaxies. I. A sample of isolated pairs". Astronomy and Astrophysics Supplement Series. 110: 371. arXiv:astro-ph/9410092. Bibcode:1995A&AS..110..371S.
  4. ↑ "Results for object NGC 7636". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 1 October 2026.
  5. ↑ Nakano, S. (2010). "Supernova 2010kx in NGC 7645". Central Bureau Electronic Telegrams (2599): 1. Bibcode:2010CBET.2599....1N.
  6. ↑ Morrell, N. (2011). "Supernova 2011ed = PSN J19153440-5437400 and Supernova 2010kx". Central Bureau Electronic Telegrams (2767): 2. Bibcode:2011CBET.2767....2M.
  7. ↑ "SN 2010kx". Transient Name Server. IAU. Retrieved 1 October 2026.
  8. ↑ "SN 2026aabq". Transient Name Server. IAU. Retrieved 1 October 2026.

Notes