NGC 720
| Galaxy NGC 720 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 53 m 00.5 s |
| declination | -13 ° 44 ′ 19 ″ |
| Appearance | |
| Morphological type | E5 |
| Brightness (visual) | 10.2 mag |
| Brightness (B-band) | 11.2 mag |
| Angular expansion | 4.7 ′ × 2.4 ′ |
| Position angle | 140 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 720 group LGG 38 |
| Redshift | 0.005821 ± 0.000022 |
| Radial velocity | 1745 ± 7 km / s |
|
Stroke distance v rad / H 0 |
(78 ± 6) · 10 6 ly (23.9 ± 1.7) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | October 3, 1785 |
| Catalog names | |
| NGC 720 • PGC 6983 • MCG -02-05-068 • GC 431 • H I 105 • h 165/2443 • GALEX MSC J015300.62-134420.8 • USGC S068 NED01 | |
NGC 720 is an elliptical galaxy of Hubble type E5 in the constellation Cetus south of the ecliptic . It is estimated to be 78 million light years from the Milky Way and about 110,000 light years in diameter.
In the same area of the sky is u. a. the galaxy NGC 715 .
The object was discovered on October 3, 1785 by the British astronomer William Herschel .