NGC 6660
| Galaxy NGC 6660 / NGC 6661 |
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|---|---|
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| AladinLite | |
| Constellation | Hercules |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 18 h 34 m 36.7 s |
| declination | + 22 ° 54 ′ 35 ″ |
| Appearance | |
| Morphological type | SA (s) 0 / a |
| Brightness (visual) | 12.3 mag |
| Brightness (B-band) | 13.2 mag |
| Angular expansion | 1.8 '× 1.1' |
| Position angle | 145 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Redshift | 0.014130 ± 0.000073 |
| Radial velocity | 4236 ± 22 km / s |
|
Stroke distance v rad / H 0 |
(198 ± 14) · 10 6 ly (60.6 ± 4.3) Mpc |
| history | |
| discovery | Lewis Swift |
| Discovery date | July 14, 1885 |
| Catalog names | |
| NGC 6660 • 6661 • UGC 11282 • PGC 62072 • CGCG 143-003 • MCG + 04-44-003 • 2MASX J18343666 + 2254347 • LDCE 1300 NED007 | |
NGC 6660 = NGC 6661 is a lenticular galaxy of the Hubble type S0 / a in the constellation Hercules in the northern sky . It is estimated to be 198 million light years from the Milky Way and about 105,000 light years across.
In the same area of the sky is u. a. the galaxy NGC 6658 .
The object was discovered by Lewis Swift on July 14, 1885 .