NGC 4742
Galaxy NGC 4742 |
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AladinLite | |
Constellation | Virgin |
Position equinox : J2000.0 , epoch : J2000.0 |
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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 " .