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NGC 4495

Coordinates:Sky map12h 31m 22.9217s, +29° 08′ 11.472″
From Wikipedia, the free encyclopedia
Galaxy in the constellation Coma Berenices

NGC 4495
Observation data (J2000epoch)
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 aspiral galaxy in theconstellation ofComa Berenices. Its velocity with respect to thecosmic microwave background is 4850 ± 20 km/s, which corresponds to aHubble distance of 233.3 ± 16.4 Mly (71.54 ± 5.02 Mpc).[1] Additionally, 31non-redshift measurements give a distance of 223.50 ± 3.58 Mly (68.526 ± 1.099 Mpc).[2] It was discovered byGerman-British astronomerWilliam Herschel on 13 March 1785.[3]

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

Supernovae

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Threesupernovae 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 theLa 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

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References

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  1. ^abcdefghijk"Results for object NGC 4495".NASA/IPAC Extragalactic Database.NASA andCaltech. Retrieved14 December 2024.
  2. ^"Distance Results for NGC 4495".NASA/IPAC EXTRAGALACTIC DATABASE.NASA. Retrieved14 December 2024.
  3. ^Seligman, Courtney."New General Catalogue Objects: NGC 4495".Celestial Atlas. Retrieved14 December 2024.
  4. ^"NGC 4495".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved14 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. Retrieved14 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. Retrieved14 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. Retrieved14 December 2024.

External links

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