NGC 4495

NGC 4495
NGC 4495 imaged by the Cerro Tololo Inter-American Observatory
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension12h 31m 22.9217s[1]
Declination+29° 08′ 11.472″[1]
Redshift0.015243[1]
Heliocentric radial velocity4570 ± 3 km/s[1]
Distance233.3 ± 16.4 Mly (71.54 ± 5.02 Mpc)[1]
Apparent magnitude (V)13.3[1]
Characteristics
TypeSab[1]
Size~104,000 ly (31.89 kpc) (estimated)[1]
Apparent size (V)1.4′ × 0.8′[1]
Other designations
IRAS 12289+2924, 2MASX J12312290+2908109, UGC 7663, MCG +05-30-012, PGC 41438, CGCG 159-009[1]

NGC 4495 is a spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 4850 ± 20 km/s, which corresponds to a Hubble distance of 233.3 ± 16.4 Mly (71.54 ± 5.02 Mpc).[1] Additionally, 31 non-redshift measurements give a distance of 223.50 ± 3.58 Mly (68.526 ± 1.099 Mpc).[2] It was discovered by German-British astronomer William Herschel on 13 March 1785.[3]

According to the SIMBAD database, NGC 4495 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[4]

Supernovae

Three supernovae have been observed in NGC 4495:

  • SN 1994S (type Ia, mag. 14.5) was discovered by Larry Mitchell on 4 June 1994.[5][6]
  • SN 2010lo (type unknown, mag. 17.3) was discovered by the La Sagra Sky Survey on 15 December 2010.[7][8]
  • SN 2011ca (type Ic, mag. 17.2) was discovered by Fabrizio Ciabattari and E. Mazzoni on 26 April 2011.[9][10]

See also

References

  1. ^ a b c d e f g h i j k "Results for object NGC 4495". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 14 December 2024.
  2. ^ "Distance Results for NGC 4495". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 14 December 2024.
  3. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 4495". Celestial Atlas. Retrieved 14 December 2024.
  4. ^ "NGC 4495". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 14 December 2024.
  5. ^ Skiff, B.; Mitchell, L.; Wheeler, J. C.; Wills, D.; Clocchiatti, A. (1994). "Supernova 1994S in NGC 4495". International Astronomical Union Circular (6005): 1. Bibcode:1994IAUC.6005....1S.
  6. ^ "SN 1994S". Transient Name Server. IAU. Retrieved 14 December 2024.
  7. ^ Green, D. W. E. (2010). "Supernova 2010lo near NGC 4495". Central Bureau Electronic Telegrams. 2608: 1. Bibcode:2010CBET.2608....1G.
  8. ^ "SN 2010lo". Transient Name Server. IAU. Retrieved 14 December 2024.
  9. ^ Ciabattari, F.; Mazzoni, E.; Marion, G. H.; Berlind, P. (2011). "Supernova 2011ca in NGC 4495 = PSN J12312490+2907500". Central Bureau Electronic Telegrams. 2710: 1. Bibcode:2011CBET.2710....1C.
  10. ^ "SN 2011ca". Transient Name Server. IAU. Retrieved 14 December 2024.

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