NGC 4802
Galaxy NGC 4802 / NGC 4804 |
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AladinLite | |
Constellation | Crow |
Position equinox : J2000.0 , epoch : J2000.0 |
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Right ascension | 12 h 55 m 49.6 s |
declination | -12 ° 03 ′ 19 ″ |
Appearance | |
Morphological type | SA (r) 0? |
Brightness (visual) | 11.6 mag |
Brightness (B-band) | 12.6 mag |
Angular expansion | 2.4 ′ × 1.6 ′ |
Position angle | 20 ° |
Surface brightness | 12.9 mag / arcmin² |
Physical data | |
Affiliation | LGG 307 |
Redshift | 0.003139 ± 0.000150 |
Radial velocity | 941 ± 45 km / s |
Stroke distance v rad / H 0 |
(37 ± 3) x 10 6 ly (11.4 ± 1.0) Mpc |
diameter | 25,000 ly |
history | |
discovery | Wilhelm Herschel |
Discovery date | March 27, 1786 |
Catalog names | |
NGC 4802, 4804 • PGC 44087 • MCG -02-33-061 • IRAS 12532-1147 • 2MASX J12554963-1203192 • GC 3307 • H IV 40 • |
NGC 4802 = NGC 4804 is an 11.6 mag bright, lens-shaped dwarf galaxy of the Hubble type S0 in the constellation Raven south of the ecliptic . It is estimated to be 37 million light-years away from the Milky Way and has a diameter of about 25,000 ly
. a. the galaxies NGC 4782 , NGC 4783 , NGC 4792 , NGC 4794 .
The object was discovered on March 27, 1786 by Wilhelm Herschel with an 18.7-inch reflector telescope , which she labeled “suspected. A pB star with a seeming brush to it np may be a vS neb. close to it. No time to verify it “(observation listed in the catalog as NGC 4804 ); then on April 20, 1882 by Ernst Wilhelm Leberecht Tempel (and listed as NGC 4802 ).