NGC 6641
| Galaxy NGC 6641 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Hercules |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 18 h 28 m 57.4 s |
| declination | + 22 ° 54 ′ 11 ″ |
| Appearance | |
| Morphological type | SBa |
| Brightness (visual) | 13.5 likes |
| Brightness (B-band) | 14.3 mag |
| Angular expansion | 0.9 ′ × 0.7 ′ |
| Position angle | 102 ° |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Redshift | 0.013826 +/- 0.000033 |
| Radial velocity | +4145 ± 10 km / s |
|
Stroke distance v rad / H 0 |
(193 ± 14) · 10 6 ly (59.3 ± 4.2) Mpc |
| history | |
| discovery | Truman Safford |
| Discovery date | August 9, 1866 |
| Catalog names | |
| NGC 6641 • UGC 11250 • PGC 61935 • CGCG 142-49 • MCG + 04-43-035 • IRAS 18268 + 2252 • 2MASX J18285738 + 2254106 • GC 5916 • LDCE 1300 NED004 + Stephan V | |
NGC 6641 is a spiral galaxy of Hubble type S in the constellation Hercules at the northern sky . It is estimated to be 193 million light years from the Milky Way and about 50,000 light years in diameter.
The object was discovered by Truman Henry Safford on August 9, 1866 .