NGC 7643
| Galaxy NGC 7643 / NGC 7644 |
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|---|---|
|
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| LEDA 214948 (bottom left), NGC 7643, LEDA 1402419 (top right), SDSS image | |
| AladinLite | |
| Constellation | Pegasus |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 23 h 22 m 50.4 s |
| declination | + 11 ° 59 ′ 20 ″ |
| Appearance | |
| Morphological type | Sc |
| Brightness (visual) | 13.2 mag |
| Brightness (B-band) | 14.1 mag |
| Angular expansion | 1.4 'x 0.7' |
| Position angle | 45 ° |
| Surface brightness | 13.1 mag / arcmin² |
| Physical data | |
| Redshift | 0.012936 ± 0.000023 |
| Radial velocity | 3878 ± 7 km / s |
|
Stroke distance v rad / H 0 |
(180 ± 13) x 10 6 ly (55.3 ± 3.9) Mpc |
| history | |
| discovery | Édouard Stephan |
| Discovery date | September 24, 1873 |
| Catalog names | |
| NGC 7643 • 7644 • UGC 12563 • PGC 71261 • CGCG 431-051 • MCG + 02-59-033 • IRAS F23202 + 1142 • 2MASX J23225040 + 1159195 • GALEX ASC J232250.31 + 115918.5 • LDCE 1576 NED002 | |
NGC 7643 = NGC 7644 is a spiral galaxy of the Hubble type Sc in the constellation Pegasus in the northern sky . It is an estimated 180 million light years from the Milky Way and about 75,000 light years in diameter .
The galaxies NGC 7627 , NGC 7639 , IC 1483 , IC 1484 are located in the same area of the sky .
The object was discovered by Édouard Stephan on September 24, 1873 .