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NGC 4492 is a spiral galaxy[4] located about 90 million light-years away [2] in the constellation Virgo.[5] NGC 4492 was discovered by astronomer William Herschel on December 28, 1785. It was rediscovered by astronomer Arnold Schwassmann on January 23, 1900 and was listed as IC 3438.[6] NGC 4492 lies in the direction of the Virgo Cluster. However, it is not considered to be a member of that cluster.[7]

NGC 4492
Pan-STARRS image of NGC 4492
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 30m 59.7s[1]
Declination08° 04′ 40″[1]
Redshift0.005804/1740 km/s[1]
Distance90,950,000 ly[2][3]
Apparent magnitude (V)13.0[1]
Characteristics
TypeSA(s)a?[1]
Size~33,450 ly (estimated)[1]
Apparent size (V)1.58 x 1.25[1]
Other designations
IC 3438, PGC 41383, UGC 7656, VCC 1330[1]

Physical characteristics


NGC 4492 has a relatively large bulge while showing signs of weak spiral structure.[7] The spiral arms are also outlined by lanes of Interstellar dust.[8]


Virgo Cluster membership


NGC 4492 is listed in the Virgo Cluster Catalog as VCC 1330.[8] However, distance estimates to the galaxy place it at a location far outside of the cluster's center.[2][7] Also, its radial velocity indicates that NGC 4492 is not gravitationally bound to the Virgo Cluster but is expanding away from it. Therefore, NGC 4492 is not a member of the Virgo Cluster but rather a background galaxy.[7]


See also



References


  1. "NASA/IPAC Extragalactic Database". Results for NGC 4492. Retrieved 2017-10-25.
  2. Carmen Toribio, M.; Solanes, Jose M. (10 November 2009). "H i DISTRIBUTION AND TULLY–FISHER DISTANCES OF GAS-POOR SPIRAL GALAXIES IN THE VIRGO CLUSTER REGION". The Astronomical Journal. 138 (6): 1957–1968. arXiv:0909.3615. Bibcode:2009AJ....138.1957T. doi:10.1088/0004-6256/138/6/1957. S2CID 15207214.
  3. "parsecs to lightyears conversion". Retrieved 2017-09-30.
  4. "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-27.
  5. Rojas, Sebastián García. "Galaxy NGC 4492 - Spiral Galaxy in Virgo Constellation · Deep Sky Objects Browser". DSO Browser. Retrieved 2017-10-27.
  6. "New General Catalog Objects: NGC 4450 - 4499". cseligman.com. Retrieved 2017-10-27.
  7. Sanchis, T.; Mamon, G. A.; Salvador-Solé, E.; Solanes, J. M. (2004-05-01). "The origin of H I-deficiency in galaxies on the outskirts of the Virgo cluster". Astronomy & Astrophysics. 418 (2): 393–411. arXiv:astro-ph/0401367. Bibcode:2004A&A...418..393S. doi:10.1051/0004-6361:20034158. ISSN 0004-6361. S2CID 18787428.
  8. Binggeli, B.; Sandage, A.; Tammann, G. A. (1985). "Studies of the Virgo Cluster. II – A catalog of 2096 galaxies in the Virgo Cluster area". Astronomical Journal. 90: 1681–1759. Bibcode:1985AJ.....90.1681B. doi:10.1086/113874.


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На других языках

[de] NGC 4492

NGC 4492 = IC 3438 ist eine Spiralgalaxie vom Hubble-Typ Sa im Sternbild Jungfrau auf der Ekliptik. Sie ist schätzungsweise 75 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 35.000 Lichtjahren. Die Galaxie ist unter der Katalognummer VCC 1330 als Mitglied des Virgo-Galaxienhaufens gelistet und gilt als Mitglied der NGC 4535-Gruppe (LGG 296).
- [en] NGC 4492

[ru] NGC 4492

NGC 4492 (другие обозначения — IC 3438, UGC 7656, MCG 1-32-89, ZWG 42.141, VCC 1330, PGC 41383) — спиральная галактика (Sa) в созвездии Дева.


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