NGC 5987
| Galaxy NGC 5987 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Dragon |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 15 h 39 m 57.4 s |
| declination | + 58 ° 04 ′ 46 ″ |
| Appearance | |
| Morphological type | Sb |
| Brightness (visual) | 11.9 likes |
| Brightness (B-band) | 12.7 mag |
| Angular expansion | 4.2 ′ × 1.3 ′ |
| Position angle | 65 ° |
| Surface brightness | 13.6 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 5982 group LGG 402 |
| Redshift | 0.010040 ± 0.000020 |
| Radial velocity | (3010 ± 6) km / s |
|
Stroke distance v rad / H 0 |
(142 ± 10) · 10 6 ly (43.5 ± 3.0) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | May 25, 1788 |
| Catalog names | |
| NGC 5987 • UGC 9971 • PGC 55740 • CGCG 297-026 • MCG + 10-22-032 • IRAS 15387 + 5814 • 2MASX J15395738 + 5804463 • GC 4130 • H II 765 • LDCE 1141 NED004 | |
NGC 5987 is an 11.9 mag bright spiral galaxy of the Hubble type Sb in the constellation Dragon in the northern sky . It is an estimated 142 million light years away from the Milky Way and about 170,000 light years in diameter . The galaxy is a member of the NGC 5982 group , which also includes NGC 5976 , NGC 5981 , NGC 5985, and NGC 5989 .
The object was discovered on May 25, 1788 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “pF, cS”.