NGC 748
| Galaxy NGC 748 |
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|---|---|
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| NGC 748 & LEDA 1057825 SDSS Recording | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 01 h 56 m 21.8 s |
| declination | -04 ° 28 ′ 04 ″ |
| Appearance | |
| Morphological type | (R ') SA (r) b? |
| Brightness (visual) | 12.6 mag |
| Brightness (B-band) | 13.4 mag |
| Angular expansion | 2.3 ′ × 1.1 ′ |
| Position angle | 138 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.017732 ± 0.000017 |
| Radial velocity | 5316 ± 5 km / s |
|
Stroke distance v rad / H 0 |
(239 ± 17) x 10 6 ly (73.2 ± 5.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 20, 1784 |
| Catalog names | |
| NGC 748 • PGC 7259 • MCG -01-06-004 • IRAS 01538-0442 • 2MASX J01562179-0428034 • GC 453 • H III 193 • h 176 • LEDA 7259 • LDCE 110 NED009 | |
NGC 748 is a spiral galaxy of Hubble type Sb in the constellation Cetus south of the celestial equator . It is estimated to be 239 million light years away from the Milky Way and has a diameter of around 165,000 ly.
In the same area of the sky is the galaxy NGC 762 , among others .
The object was discovered on September 20, 1784 by the German-British astronomer Wilhelm Herschel .
Web links
Commons : NGC 748 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- Auke Slotegraaf: NGC 748. Deep Sky Observer's Companion, accessed on February 26, 2016 (English).
- NGC 748. DSO Browser, accessed February 26, 2016 .