NGC 3661
Galaxy NGC 3661 / IC 689 |
|
---|---|
NGC 3661, Pan-STARRS | |
AladinLite | |
Constellation | cups |
Position equinox : J2000.0 , epoch : J2000.0 |
|
Right ascension | 11 h 23 m 38.43 s |
declination | -13 ° 49 ′ 52.0 ″ |
Appearance | |
Morphological type | SA (r) 0 / a: |
Brightness (visual) | 13.1 mag |
Brightness (B-band) | 14.0 mag |
Angular expansion | 1.6 '× 0.6' |
Position angle | 137 ° |
Surface brightness | 12.9 mag / arcmin² |
Physical data | |
Redshift | 0.022312 ± 0.000103 |
Radial velocity | 6689 ± 31 km / s |
Stroke distance v rad / H 0 |
(292 ± 21) · 10 6 ly (89.4 ± 6.3) Mpc |
history | |
discovery | William Herschel |
Discovery date | March 27, 1786 |
Catalog names | |
NGC 3661 • IC 689 • PGC 34986 • MCG -02-29-022 • IRAS F11211-1333 • 2MASX J11233844-1349520 • GC 2402 • H III 530 • h 3339 • GALEX ASC J112338.51-134951.1 • WISEA J112338.41- 134951.7 • LDCE 814 NED001 |
NGC 3661 = IC 689 is a lens-shaped galaxy of the Hubble type S0 / a in the constellation Becher in the southern sky . It is an estimated 292 million light years from the Milky Way and about 140,000 light years in diameter.
In the same area of the sky is u. a. the galaxy NGC 3667 .
The object was discovered by Wilhelm Herschel on March 27, 1786 .