NGC 87
| Galaxy data from NGC 87 |
|
|---|---|
 |
|
| Roberts Quartet consisting of NGC 87 (top right), NGC 88 (middle), NGC 89 (bottom) and NGC 92 (top left). | |
| AladinLite | |
| Constellation | Phoenix |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 00 h 21 m 14.3 s |
| declination | -48 ° 37 ′ 42 ″ |
| Appearance | |
| Morphological type | IBm pec HII |
| Brightness (visual) | 14.1 mag |
| Brightness (B-band) | 14.7 mag |
| Angular expansion | 0.9 ′ × 0.7 ′ |
| Position angle | 171 ° |
| Surface brightness | 13.4 mag / arcmin² |
| Physical data | |
| Affiliation | Roberts Quartet |
| Redshift | 0.011391 ± 0.000077 |
| Radial velocity | 3415 ± 23 km / s |
|
Stroke distance v rad / H 0 |
(150 ± 10) x 10 6 ly (45.9 ± 3.2) Mpc |
| history | |
| discovery | JFW Herschel |
| Discovery date | September 30, 1834 |
| Catalog names | |
| NGC 87 • PGC 1357 • ESO 194-8 • SGC 001848-4854.4 • GC 43 • h 2316 • AM 0018-485 | |
NGC 87 is an irregular galaxy in the constellation Phoenix . It is about 150 million light years away from the Milky Way , with a diameter of about 35,000 light years. NGC 87 is part of a group of galaxies called the Roberts Quartet , which also includes NGC 88 , NGC 89, and NGC 92 .
discovery
The galaxy NGC 87 was discovered on September 30, 1834 by the British astronomer John Frederick William Herschel .