Wikipedia

NGC 662

NGC 662 is a spiral galaxy in the constellation of Andromeda. Its velocity with respect to the cosmic microwave background is 5,397 ± 18 km/s, which corresponds to a Hubble distance of 79.6 ± 5.6 Mpc (~260 million light-years).[1] It was discovered by French astronomer Édouard Stephan on 22 November 1884.[2]

NGC 662
NGC 662 imaged by Pan-STARRS
Observation data (J2000 epoch)
ConstellationAndromeda
Right ascension01h 44m 35.4353s[1]
Declination+37° 41′ 45.165″[1]
Redshift0.018860[1]
Heliocentric radial velocity5654 ± 4 km/s[1]
Distance259.7 ± 18.2 Mly (79.61 ± 5.58 Mpc)[1]
Apparent magnitude (V)13.0[1]
Characteristics
TypeS pec[1]
Size~89,600 ly (27.48 kpc) (estimated)[1]
Apparent size (V)0.8′ × 0.5′[1]
Other designations
IRAS 01416+3726, 2MASX J01443544+3741447, UGC 1220, MCG +06-04-060, PGC 6393[1]

According to the Simbad database, NGC 662 is a radio galaxy.[3] It features a broad HI line[4] and is classified a field galaxy, meaning it does not belong to the galaxy group nor a cluster and is therefore gravitationally isolated.[5]

Supernovae

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Three supernovae have been observed in NGC 662:

  • SN 2001dn (Type Ia, mag. 15.5) was discovered by Tom Boles on 14 August 2001.[6][7]
  • SN 2022ojo (Type II-P, mag. 16.938) was discovered by ATLAS on 5 July 2022.[8]
  • SN 2024pcw (Type II, mag. 18.724) was discovered by ATLAS on 8 July 2024.[9]

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 662". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 23 July 2024.
  2. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 662". Celestial Atlas. Retrieved 13 December 2024.
  3. ↑ "NGC 662". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 December 2024.
  4. ↑ Haynes, Martha P.; Giovanelli, Riccardo; Herter, Terry; Vogt, Nicole P.; Freudling, Wolfram; Maia, M. A. G.; Salzer, J. J.; Wegner, G. (1997-04-01). "21 CM H1 Line Spectra of Galaxies in Nearby Clusters". The Astronomical Journal. 113: 1197–1211. Bibcode:1997AJ....113.1197H. doi:10.1086/118337. ISSN 0004-6256.
  5. ↑ Karachentseva, V. E. (1973-01-01). "The Catalogue of Isolated Galaxies". Astrofizicheskie Issledovaniia Izvestiya Spetsial'noj Astrofizicheskoj Observatorii. 8: 3–49. Bibcode:1973AISAO...8....3K.
  6. ↑ Hurst, G. M.; Boles, T.; Armstrong, M. (2001). "Supernova 2001dn in NGC 662". International Astronomical Union Circular (7681): 1. Bibcode:2001IAUC.7681....1H.
  7. ↑ "SN 2001dn". Transient Name Server. IAU. Retrieved 13 December 2024.
  8. ↑ "SN 2022ojo". Transient Name Server. IAU. Retrieved 13 December 2024.
  9. ↑ "SN 2024pcw". Transient Name Server. IAU. Retrieved 13 December 2024.
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