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NGC 7645

Coordinates: Sky map 23h 23m 47.3070s, −29° 23′ 17.083″
From Wikipedia, the free encyclopedia

NGC 7645
NGC 7645 imaged by Legacy Surveys
Observation data (J2000 epoch)
ConstellationSculptor
Right ascension23h 23m 47.3070s[1]
Declination−29° 23′ 17.083″[1]
Redshift0.023086±0.00000900[1]
Heliocentric radial velocity6,921±3 km/s[1]
Distance318.6 ± 22.3 Mly (97.68 ± 6.84 Mpc)[1]
Apparent magnitude (V)13.77[1]
Characteristics
TypeSB(r)c[1]
Size~205,600 ly (63.04 kpc) (estimated)[1]
Apparent size (V)1.4′ × 1.2′[1]
Other designations
ESO 470- G 003, 2MASX J23234727-2923170, MCG -05-55-007, PGC 71314[1]

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).[1] It was discovered by British astronomer John Herschel on 27 September 1834.[2]

Pair of galaxies

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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.[3] 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.[4] The galaxies are separated by an angular distance of 17.4′.

Supernovae

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Two supernovae have been observed in NGC 7645:

See also

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References

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  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

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[edit]
  • Wikimedia Commons logo Media related to NGC 7645 at Wikimedia Commons
  • NGC 7645 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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