NGC 4457
| NGC 4457 | |
|---|---|
| 250px
The galaxy NGC 4457.
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| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 28m 59.0s[1] |
| Declination | 03° 34′ 14″[1] |
| Redshift | 0.002942/882 km/s[1] |
| Distance | 54,801,600 ly |
| Group or cluster | Virgo Cluster |
| Type | (R)SAB(s)0/a, LINER [1] |
| Size (ly) | ~ 38,687.32 ly |
| Apparent dimensions (V) | 2.7 x 2.3[1] |
| Apparent magnitude (V) | 11.76 [1] |
| Other designations | |
| CGCG 42-124, IRAS 12264+0350, MCG 1-32-75, PGC 41101, UGC 7609, VCC 1145 [1] | |
NGC 4457 is a spiral galaxy located about 55 million light-years away[2] in the constellation of Virgo.[3] It is also classified as a LINER galaxy, a class of Active galaxy defined by their spectral line emissions.[4][2] NGC 4457 Is inclined by about 33°.[5] NGC 4457 was discovered by astronomer William Herschel on February 23, 1784.[6] NGC 4457 is a member of the Virgo Cluster of galaxies.[7][8]
Physical characteristics
NGC 4457 has a broad oval zone containing an inner spiral. The inner spiral is defined mainly by two fairly open arms. There is a well-defined outer ring that is completely detached from the inner regions of the galaxy.[7]
Truncated disk
NGC 4457 has a severely reduced amount of star-formation in it's disk while it's inner regions have a normalized rate of massive star formation.[7] This may have been caused by a recent interaction of the gas in the galaxy and the gas in the surrounding cluster[9] causing the gas to get stripped away in effect known as Ram Pressure Stripping.[10]
See also
External links
- NGC 4457 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- Sasmirala page on NGC 4457
References
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