| NGC 4492 | |
|---|---|
 Pan-STARRS image of NGC 4492 | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12 30 59.7 |
| Declination | 08° 04′ 40″ |
| Redshift | 0.005804/1740 km/s |
| Distance | 90,950,000 ly |
| Apparent magnitude (V) | 13.0 |
| Characteristics | |
| Type | SA(s)a? |
| Size | ~33,450 ly (estimated) |
| Apparent size (V) | 1.58 x 1.25 |
| Other designations | |
| IC 3438, PGC 41383, UGC 7656, VCC 1330 | |
NGC 4492 is a spiral galaxy located about 90 million light-years away in the constellation Virgo. 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. NGC 4492 lies in the direction of the Virgo Cluster. However, it is not considered to be a member of that cluster.
Physical characteristics
NGC 4492 has a relatively large bulge while showing signs of weak spiral structure. The spiral arms are also outlined by lanes of interstellar dust.
Virgo Cluster membership
NGC 4492 is listed in the Virgo Cluster Catalog as VCC 1330. However, distance estimates to the galaxy place it at a location far outside of the cluster's center. 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.
See also
References
- ^ "NASA/IPAC Extragalactic Database". Results for NGC 4492. Retrieved 2017-10-25.
- ^ 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.
- ^ 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.
- ^ 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
