NGC 4778
Galaxy NGC 4778 |
|
---|---|
AladinLite | |
Constellation | Virgin |
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.) ".