NGC 4742
| Galaxy NGC 4742 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 51 m 48.0 s |
| declination | -10 ° 27 ′ 17 ″ |
| Appearance | |
| Morphological type | E4 |
| Brightness (visual) | 11.3 mag |
| Brightness (B-band) | 12.1 mag |
| Angular expansion | 2.6 ′ × 1.5 ′ |
| Position angle | 81 ° |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Affiliation | Virgo Galaxy Cluster LGG 307 |
| Redshift | 0.004236 +/- 0.000050 |
| Radial velocity | 1270 +/- 15 km / s |
|
Stroke distance v rad / H 0 |
(52 ± 4) · 10 6 ly (15.9 ± 1.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | March 25, 1786 |
| Catalog names | |
| NGC 4742 • PGC 43594 • MCG -02-33-032 • IRAS 12490-1009 • 2MASX J12514803-1027172 • GC 3262 • H I 133 • h 3432 • LDCE 0904 NED264 | |
NGC 4742 is a 11.3 likes bright elliptical galaxy from the Hubble type E4 in the constellation Virgo to the ecliptic , the estimated 52 million light-years from the Milky Way 's center.
The galaxies NGC 4757 , NGC 4760 , NGC 4766 , NGC 4781 are in the same area of the sky .
The object was discovered on March 25, 1786 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “cB, vS, BN”. During his observation with an 18-inch reflector telescope in 1847, John Herschel noted: “A star 9th mag, with a strong burr about a very small extent; diameter 10 arcseconds. It is the best specimen of the class of 'stellar nebulae' that I remember to have seen. A star Sf 10th mag, distance 1.5 ′; has no burr " .