NGC 4668
| Galaxy NGC 4668 |
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|---|---|
|
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| SDSS recording | |
| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 45 m 32.0 s |
| declination | -00 ° 32 ′ 09 ″ |
| Appearance | |
| Morphological type | SB (s) d: / NLAGN |
| Brightness (visual) | 12.9 mag |
| Brightness (B-band) | 13.6 mag |
| Angular expansion | 1.4 ′ × 0.8 ′ |
| Position angle | 5 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 299 |
| Redshift | 0.005457 ± 0.000023 |
| Radial velocity | 1636 ± 7 km / s |
|
Stroke distance v rad / H 0 |
(69 ± 5) · 10 6 ly (21.2 ± 1.5) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 11, 1787 |
| Catalog names | |
| NGC 4668 • UGC 7931 • PGC 42999 • CGCG 015-016 • MCG + 00-33-009 • IRAS 12429-0015 • 2MASX J12453194-0032023 • GC 3200 • H III 663 • LDCE 904 NED244 • HOLM 453B • EVCC 1140 | |
NGC 4668 is a 12.9 likes bright barred spiral galaxy with an active galactic nucleus from Hubble type SBCD in the constellation Virgo to the ecliptic . It is estimated 69 million light years away from the Milky Way and has a diameter of about 25,000 ly. Together with NGC 4632 and NGC 4666 , it forms the small galaxy group LGG 299.
In the same area of the sky are u. a. the galaxies NGC 4642 , NGC 4653 .
The object was discovered on April 11, 1787 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “vF, S, iF”.
Web links
- NGC 4668. SIMBAD , accessed January 30, 2015 .
- NGC 4668. DSO Browser, accessed January 30, 2015 .
- ESO: The superwind galaxy NGC 4666 with NGC 4668