NGC 638
| Galaxy NGC 638 |
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|---|---|
![NGC 638 [1]](https://de.wikipedia.org/wiki/Datei:NGC638_-_SDSS_DR14.jpg)
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| NGC 638 | |
| AladinLite | |
| Constellation | fishes |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 01 h 39 m 37.85 s |
| declination | + 07 ° 14 ′ 14.4 ″ |
| Appearance | |
| Morphological type | Sb |
| Brightness (visual) | 13.7 mag |
| Brightness (B-band) | 14.5 mag |
| Angular expansion | 0.8 ′ × 0.5 ′ |
| Position angle | 20 ° |
| Surface brightness | 12.6 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 645 group LGG 28 |
| Redshift | +0.010594 ± 0.000137 |
| Radial velocity | 3176 ± 41 km / s |
|
Stroke distance v rad / H 0 |
(145 ± 10) · 10 6 ly (44.5 ± 3.2) Mpc |
| history | |
| discovery | Lewis A. Swift |
| Discovery date | October 22, 1886 |
| Catalog names | |
| NGC 638 • UGC 1170 • PGC 6145 • CGCG 412-011 • MCG + 01-05-014 • IRAS 01370 + 0659 • 2MASX J01393785 + 0714144 • Mrk 1003 • GALEX ASC J013937.76 + 071415.6 • LDCE 100 NED002 | |
NGC 638 is a spiral galaxy of Hubble type Sb in the constellation Pisces on the ecliptic . It is estimated to be 145 million light years from the Milky Way and about 35,000 light years across. Together with four other galaxies, it forms the NGC 645 group ( LGG 28 )
In the same area of the sky is u. a. the galaxy NGC 652 .
The object was discovered on October 22, 1886 by the American astronomer Lewis A. Swift .
Web links
Commons : NGC 638 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- Auke Slotegraaf : NGC 638. Deep Sky Observer's Companion, accessed September 4, 2015 .