NGC 1643
| Galaxy NGC 1643 |
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|---|---|
![NGC 1643 with HIPASS J0443-05 S5 [1] (u)](https://de.wikipedia.org/wiki/Datei:NGC1643_-_SDSS_DR14.jpg)
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| NGC 1643 with HIPASS J0443-05 S5 (u) | |
| AladinLite | |
| Constellation | Eridanus |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 04 h 43 m 43.9 s |
| declination | -05 ° 19 ′ 10 ″ |
| Appearance | |
| Morphological type | SB (r) bc |
| Brightness (visual) | 13.3 mag |
| Brightness (B-band) | 14.1 mag |
| Angular expansion | 1.2 ′ × 1.1 ′ |
| Position angle | 147 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.016269 ± 0.000026 |
| Radial velocity | 4877 ± 8 km / s |
|
Stroke distance v rad / H 0 |
(214 ± 15) · 10 6 ly (65.6 ± 4.6) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | November 28, 1786 |
| Catalog names | |
| NGC 1643 • PGC 5891 • MCG -01-13-001 • IRAS 04412-0524 • 2MASX J04434396-0519100 • GC 893 • H III 588 • h 328 • HIPASS J0443-05 • LDCE 312 NED032 | |
NGC 1643 is a spiral galaxy of Hubble type Sbc in the constellation Eridanus at the southern sky . It is an estimated 214 million light years from the Milky Way and about 75,000 light years in diameter.
The galaxies NGC 1645 , NGC 1656 , NGC 1659 , NGC 1677 are in the same area of the sky .
The supernovae SN 1995G (Type-IIn) and SN 1999et (Type-II) were observed here.
The object was discovered by Wilhelm Herschel on November 28, 1786 .
Web links
Commons : NGC 1643 - collection of images, videos, and audio files
