NGC 747
| Galaxy NGC 747 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 01 h 57 m 30.4 s |
| declination | -09 ° 27 ′ 45 ″ |
| Appearance | |
| Morphological type | Sb |
| Brightness (visual) | 13.7 mag |
| Brightness (B-band) | 14.5 mag |
| Angular expansion | 1.0 ′ × 0.5 ′ |
| Position angle | 175 ° |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Redshift | 0.017939 +/- 0.000023 |
| Radial velocity | 5378 +/- 7 km / s |
|
Stroke distance v rad / H 0 |
(241 ± 17) x 10 6 ly (73.8 ± 5.2) Mpc |
| history | |
| discovery | Francis Preserved Leavenworth |
| Discovery date | 1886 |
| Catalog names | |
| NGC 747 • PGC 7366 • MCG -02-06-007 • 2MASX J01573044-0927444 • LEDA 7366 | |
NGC 747 is a spiral galaxy of Hubble type Sb in the constellation Cetus south of the celestial equator . It is estimated to be 241 million light years away from the Milky Way and has a diameter of about 70,000 ly.
In the same area of the sky are the galaxies NGC 713 , NGC 731 , NGC 755 , NGC 767 , among others .
The object was discovered in 1886 by the American astronomer Francis Preserved Leavenworth .
Web links
Commons : NGC 747 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- Auke Slotegraaf: NGC 747. Deep Sky Observer's Companion, accessed on February 26, 2016 .
- NGC 747. DSO Browser, accessed February 21, 2016 .