NGC 4492
| NGC4492 | |
|---|---|
 Pan-STARRSimage of NGC 4492 | |
| Observation data (J2000epoch) | |
| Constellation | Virgo |
| Right ascension | 12h30m59.7s[1] |
| Declination | 08° 04′ 40″[1] |
| Redshift | 0.005804/1740 km/s[1] |
| Distance | 90,950,000ly[2][3] |
| Apparent magnitude(V) | 13.0[1] |
| Characteristics | |
| Type | SA(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] | |
NGC 4492is aspiral galaxy[4]located about 90 millionlight-yearsaway[2]in theconstellationVirgo.[5]NGC 4492 was discovered by astronomerWilliam Herschelon December 28, 1785. It was rediscovered by astronomerArnold Schwassmannon January 23, 1900, and was listed asIC 3438.[6]NGC 4492 lies in the direction of theVirgo Cluster.However, it is not considered to be a member of thatcluster.[7]
Physical characteristics
[edit]NGC 4492 has a relatively largebulgewhile showing signs of weak spiral structure.[7]The spiral arms are also outlined bylanesofinterstellar dust.[8]
Virgo Cluster membership
[edit]NGC 4492 is listed in theVirgo ClusterCatalog 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 theVirgo Clusterbut is expanding away from it. Therefore, NGC 4492 is not a member of theVirgo Clusterbut rather a background galaxy.[7]
See also
[edit]References
[edit]- ^abcdefgh"NASA/IPAC Extragalactic Database".Results for NGC 4492.Retrieved2017-10-25.
- ^abcCarmen 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.S2CID15207214.
- ^ "parsecs to lightyears conversion".Retrieved2017-09-30.
- ^"Your NED Search Results".ned.ipac.caltech.edu.Retrieved2017-10-27.
- ^Rojas, Sebastián García."Galaxy NGC 4492 - Spiral Galaxy in Virgo Constellation · Deep Sky Objects Browser".DSO Browser.Retrieved2017-10-27.
- ^"New General Catalog Objects: NGC 4450 - 4499".cseligman.com.Retrieved2017-10-27.
- ^abcdSanchis, 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.ISSN0004-6361.S2CID18787428.
- ^abBinggeli, 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.
External links
[edit]
- NGC 4492 onWikiSky:DSS2,SDSS,GALEX,IRAS,Hydrogen α,X-Ray,Astrophoto,Sky Map,Articles and images
