| NGC 4492 | |
|---|---|
Pan-STARRS image of NGC 4492 | |
| Observation data ( J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 30m 59.7s [1] |
| Declination | 08° 04′ 40″ [1] |
| Redshift | 0.005804/1740 km/s [1] |
| Distance | 90,950,000 ly [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 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]
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
- ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 4492. Retrieved 2017-10-25.
- ^ a b c 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.
- ^ "parsecs to lightyears conversion". Retrieved 2017-09-30.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-27.
- ^ Rojas, Sebastián García. "Galaxy NGC 4492 - Spiral Galaxy in Virgo Constellation · Deep Sky Objects Browser". DSO Browser. Retrieved 2017-10-27.
- ^ "New General Catalog Objects: NGC 4450 - 4499". cseligman.com. Retrieved 2017-10-27.
- ^ a b c d 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.
- ^ a b 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.
External links
- NGC 4492 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
