NGC 4942
| Galaxy NGC 4942 / IC 4136 |
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|---|---|
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| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 13 h 04 m 19.1 s |
| declination | -07 ° 38 ′ 58 ″ |
| Appearance | |
| Morphological type | SAB (s) d: |
| Brightness (visual) | 13.0 likes |
| Brightness (B-band) | 13.7 mag |
| Angular expansion | 1.6 ′ × 1.3 ′ |
| Position angle | 145 ° |
| Surface brightness | 13.6 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 333 |
| Redshift | 0.005807 ± 0.000007 |
| Radial velocity | 1741 ± 2 km / s |
|
Stroke distance v rad / H 0 |
(73 ± 5) · 10 6 ly (22.5 ± 1.6) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | March 23, 1789 |
| Catalog names | |
| NGC 4942 • IC 4136 • PGC 45177 • MCG -01-33-078 • IRAS 13017-0723 • 2MASX J13041910-0738579 • GC 3384 • H III 761 • HIPASS J1304-07 • LDCE 904 NED294 | |
NGC 4942 = IC 4136 is a 13.0 mag bright bar-spiral galaxy of the Hubble type SBcd in the constellation Virgo on the ecliptic . It is estimated to be 73 million light years from the Milky Way and about 40,000 light years across . In the same area of the sky are u. a. the galaxies NGC 4925 , NGC 4928 , NGC 4948 , NGC 4958 .
The object was discovered twice; first discovered on March 23, 1789 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “vF, S” (observation listed as NGC 4942 ); then in July 1899 by DeLisle Stewart (listed as IC 4136 ).