NGC 645
| Galaxy NGC 645 |
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|---|---|
![NGC 645 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC645_-_SDSS_DR14.jpg)
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| NGC 645 SDSS image | |
| AladinLite | |
| Constellation | fishes |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 01 h 40 m 08.70 s |
| declination | + 05 ° 43 ′ 36.1 ″ |
| Appearance | |
| Morphological type | SBb: |
| Brightness (visual) | 12.7 mag |
| Brightness (B-band) | 13.5 likes |
| Angular expansion | 2.6 ′ × 1.2 ′ |
| Position angle | 125 ° |
| Surface brightness | 13.8 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 645 group LGG 28 |
| Redshift | 0.011044 ± 0.000003 |
| Radial velocity | 3311 ± 1 km / s |
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Stroke distance v rad / H 0 |
(151 ± 10) · 10 6 ly (46.3 ± 3.2) Mpc |
| history | |
| discovery | Albert Marth |
| Discovery date | October 27, 1864 |
| Catalog names | |
| NGC 645 • UGC 1177 • PGC 6172 • CGCG 412-013 • MCG + 01-05-016 • IRAS 1375 + 0528 • 2MASX J01400869 + 0543361 • HIPASS J0140 + 05 • LDCE 100 NED003 | |
NGC 645 is a barred spiral galaxy of the Hubble type SBb in the constellation Pisces on the ecliptic . It is estimated to be 151 million light years from the Milky Way and about 115,000 light years in diameter. Together with four other galaxies, it forms the NGC 645 group ( LGG 28 ).
In the same area of the sky are u. a. the galaxies NGC 631 and NGC 632 .
The object was discovered by Albert Marth on October 27, 1864 .
NGC 645 group ( LGG 28 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 632 | PGC 6007 | 145 |
| NGC 638 | PGC 6145 | 145 |
| NGC 645 | PGC 6172 | 151 |
| PGC 5907 | UGC 1137 | 141 |
| PGC 6147 | UGC 1172 | 148 |