NGC 273
| Galaxy NGC 273 |
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|---|---|
![NGC 273 with LEDA 1027596 (lo) [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC273_-_SDSS_DR14.jpg)
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| NGC 273 with LEDA 1027596 (lo) SDSS image | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 00 h 50 m 48.45 s |
| declination | -06 ° 53 ′ 08.5 ″ |
| Appearance | |
| Morphological type | S0 |
| Brightness (visual) | 12.9 mag |
| Brightness (B-band) | 13.9 likes |
| Angular expansion | 2 ′, 0 × 0 ′, 6 |
| Position angle | 102 ° |
| Surface brightness | 13.0 mag / arcmin² |
| Physical data | |
| Redshift | 0.016195 ± 0.000070 |
| Radial velocity | 4855 ± 21 km / s |
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Stroke distance v rad / H 0 |
(220 ± 15) · 10 6 ly (67.3 ± 4.7) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 10, 1785 |
| Catalog names | |
| NGC 273 • PGC 2959 • MCG -01-03-019 • 2MASX J00504843-0653087 • GC 155 • H III 430 • GALEX ASC J005048.50-065307.5 • KTS 7A • NSA 127829 • WISEA J005048.46-065308.4 | |
NGC 273 is a lenticular galaxy of the Hubble-type Sbc in the constellation Whale south of the ecliptic . It is estimated to be 220 million light years from the Milky Way and about 135,000 light years in diameter . Together with NGC 274 and NGC 275 , it forms the (optical) galaxy trio KTS 7 .
In the same area of the sky are u. a. the galaxies NGC 293 .
The object was discovered on September 10, 1785 by the German-British astronomer Wilhelm Herschel .