NGC 4778
| Galaxy NGC 4778 |
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|---|---|
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| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 53 m 05.8 s |
| declination | -09 ° 12 ′ 14 ″ |
| Appearance | |
| Morphological type | S0 + / BrClG |
| Brightness (visual) | 12.7 mag |
| Brightness (B-band) | 13.6 mag |
| Angular expansion | 1.7 ′ × 1.1 ′ |
| Position angle | 100 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Affiliation | Hickson Compact Group 62 |
| Redshift | 0.014206 ± 0.000033 |
| Radial velocity | 4259 ± 10 km / s |
|
Stroke distance v rad / H 0 |
(186 ± 13) · 10 6 ly (56.9 ± 4.0) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | March 25, 1786 |
| Catalog names | |
| NGC 4778 • 4759 B • PGC 43757 • MCG -01-32-037 • HCG 62A • GC 3290 • h 3438 • LDCE 0921 NED030 | |
NGC 4778 (also NGC 4759 B ) is a 12.7 mag bright lens-shaped galaxy of the Hubble type S0 / a in the constellation Virgo on the ecliptic . It is estimated to be 186 million light years from the Milky Way and about 100,000 light years in diameter. Together with NGC 4761 , NGC 4764 and NGC 4776 , it forms the "Hickson Compact Group 62"
The object was discovered on March 25, 1786 by Wilhelm Herschel , who mistakenly thought it, together with NGC 4776, to be an object ( NGC 4759 ). Only John Herschel was able to resolve the two individual objects NGC 4776 and NGC 4778 with an 18-inch reflector telescope during his observation on May 5, 1836, and noted “vF, S, R, vlbM, 15 arcseconds, has a star Sf; the following of two. (NB II-559 is not noticed as double in Sir W. Herschel's description.) ".