NGC 870
| Galaxy NGC 870 |
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|---|---|
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| Image of the galaxies NGC 870, NGC 871 , NGC 876 and NGC 877 with the help of the 81 cm reflecting telescope of the Mount Lemmon Observatory | |
| AladinLite | |
| Constellation | Aries |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 17 m 09.2 s |
| declination | + 14 ° 31 ′ 23 ″ |
| Appearance | |
| Morphological type | C. |
| Brightness (visual) | 15.5 mag |
| Brightness (B-band) | 16 likes |
| Angular expansion | 0.2 ′ × 0.2 ′ |
| Surface brightness | 12.7 mag / arcmin² |
| Physical data | |
| Redshift | 0.056879 ± 0.000087 |
| Radial velocity | 17052 ± 26 km / s |
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Stroke distance v rad / H 0 |
750 · 10 6 ly 230 Mpc |
| diameter | 65,000 ly |
| history | |
| discovery | RJ Mitchell |
| Discovery date | November 22, 1854 |
| Catalog names | |
| NGC 870 • PGC 8721 • MCG + 02-06-052 • 2MASX J02170921 + 1431231 • GC 514 • | |
NGC 870 is a compact galaxy in the constellation Aries on the ecliptic . It is estimated to be 750 million light years away and about 65,000 light years in diameter.
The object was discovered on November 22, 1854 by RJ Mitchell , an assistant to William Parsons , using his 72-inch " Leviathan " reflector .