NGC 646
| Galaxy NGC 646 |
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|---|---|
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| Image of the gravitationally interacting galaxies NGC 646 and (smaller) PGC 6014 using the Hubble space telescope | |
| AladinLite | |
| Constellation | Little water snake |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 01 h 37 m 21.1 s |
| declination | -64 ° 53 ′ 41 ″ |
| Appearance | |
| Morphological type | SAB (s) c pec: |
| Brightness (visual) | 13.5 likes |
| Brightness (B-band) | 14.2 mag |
| Angular expansion | 2 ′ × 1.5 ′ |
| Position angle | 78 ° |
| Surface brightness | 14.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.026842 +/- 0.000100 |
| Radial velocity | 8047 +/- 30 km / s |
|
Stroke distance v rad / H 0 |
(354 ± 25) x 10 6 ly (108.4 ± 7.6) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | November 2, 1834 |
| Catalog names | |
| NGC 646 • PGC 6010 • ESO 80-2 • MCG -5-5-3 • IRAS 01357-6508 • SGC 013547-6509.0 • VV 443 • GC 384 • h 2434 • AM 0135-650 | |
NGC 646 , also NGC 646-1, is a barred spiral galaxy of the Hubble type SBc in the constellation Little Water Snake, which is about 362 million light years away from the Milky Way . It interacts with the galaxy PGC 6014 (NGC 646-2).
It was discovered on November 2, 1834 by the British astronomer John Frederick William Herschel .
Web links
- Auke Slotegraaf: NGC 646. Deep Sky Observer's Companion, accessed September 4, 2015 .
- NGC 646.SIMBAD database, accessed September 4, 2015 .