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NGC 7637
NGC 7637 imaged by Legacy Surveys
Observation data (J2000 epoch)
Constellation	Octans
Right ascension	23 26 27.6374
Declination	−81° 54′ 41.516″
Redshift	0.012402
Heliocentric radial velocity	3718 ± 3 km/s
Distance	178.5 ± 12.5 Mly (54.73 ± 3.83 Mpc)
Apparent magnitude (V)	13
Characteristics
Type	SA(r)c
Size	~162,500 ly (49.83 kpc) (estimated)
Apparent size (V)	2.1′ × 1.9′
Other designations
ESO 012- G 001, IRAS 23226-8211, 2MASX J23262765-8154417, PGC 71440

NGC 7637 is a spiral galaxy in the constellation of Octans. Its velocity with respect to the cosmic microwave background is 3711 ± 3 km/s, which corresponds to a Hubble distance of 178.5 ± 12.5 Mly (54.73 ± 3.83 Mpc). It was discovered by British astronomer John Herschel on 17 October 1835.

Supernovae

Three supernovae have been observed in NGC 7637:

• SN 1992ao (type II, mag. 17) was discovered by Robert H. McNaught on 28 July 1992.
• SN 2012ah (type Ia, mag. 14.8) was discovered by Stuart Parker on 21 February 2012.
• SN 2022iwt (type II, mag. 16.825) was discovered by ATLAS on 29 April 2022.

See also

• List of NGC objects (7001–7840)

References

1. ^ "Results for object NGC 7637". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 December 2024.
2. Seligman, Courtney. "New General Catalogue Objects: NGC 7637". Celestial Atlas. Retrieved 18 December 2024.
3. McNaught, R. H.; Parker, Q. A.; Della Valle, M.; Gilmozzi, R. (1992). "Supernova 1992ao in NGC 7637". International Astronomical Union Circular (5573): 1. Bibcode:1992IAUC.5573....1M.
4. "SN 1992ao". Transient Name Server. IAU. Retrieved 18 December 2024.
5. Dennefeld, M.; Rajoelimanana, A.; Vaisanen, P.; Worters, H.; Tekola, A.; Uba, I.; Owayesy, F.; Tumwine, C.; Christopher, E.; Simpemba, P.; Catala, L.; Madhanpall, N.; Makhatini, S.; Mguda, Z.; Ramphul, R.; Skelton, P.; Viljoen, D.; Wilson, S. (2012). "Supernova 2012ah in NGC 7637 = PSN J23255963-8154333". Central Bureau Electronic Telegrams. 3028: 1. Bibcode:2012CBET.3028....1D.
6. "SN 2012ah". Transient Name Server. IAU. Retrieved 18 December 2024.
7. "SN 2022iwt". Transient Name Server. IAU. Retrieved 18 December 2024.

External links

• Media related to NGC 7637 at Wikimedia Commons
• NGC 7637 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

v t e Constellation of Octans
List of stars in Octans Octans in Chinese astronomy
Stars	Bayer α β γ γ γ δ ε ζ η θ ι κ λ μ μ ν ξ ο π π ρ σ (Polaris Australis) τ υ φ χ ψ ω Variable R BQ CK CW FT HR 47 512 525 4595 6837 6912 7698 7785 7812 8234 8380 8432 8526 8577 8786 8935 8957 8995 HD 142022 166066 212301 Other Gliese 877 LHS 475 TOI-4342 W2150AB
Exoplanets 2MASS J2126–8140 HD 142022 Ab HD 212301 b LHS 475 b
Galaxies	NGC 2573 7095 7098 Other PGC 10922
Category

• NGC objects
• Principal Galaxies Catalogue objects
• IRAS catalogue objects
• ESO objects
• Octans
• Astronomical objects discovered in 1835
• Discoveries by John Herschel
• Unbarred spiral galaxies