NGC 781
| Galaxy NGC 781 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Aries |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 00 m 08.9 s |
| declination | + 12 ° 39 ′ 22 ″ |
| Appearance | |
| Morphological type | Sb (f) |
| Brightness (visual) | 13.3 mag |
| Brightness (B-band) | 14.1 mag |
| Angular expansion | 1.5 ′ × 0.4 ′ |
| Position angle | 13 ° |
| Surface brightness | 12.6 mag / arcmin² |
| Physical data | |
| Affiliation | isolated |
| Redshift | 0.011618 ± 0.000067 |
| Radial velocity | 3483 ± 20 km / s |
|
Stroke distance v rad / H 0 |
(159 ± 11) · 10 6 ly (48.7 ± 3.4) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | October 16, 1784 |
| Catalog names | |
| NGC 781 • UGC 1482 • PGC 7577 • CGCG 438-011 • MCG + 02-06-010 • 2MASX J02000899 + 1239217 • GC 471 • H III 215 • GALEX ASC J020008.92 + 123920.8 • KIG 81 | |
NGC 781 is a spiral galaxy of Hubble type Sb in the constellation ram on the ecliptic. It is estimated to be 159 million light years from the Milky Way and about 70,000 light years in diameter.
The object was discovered on October 16, 1784 by the German-British astronomer Wilhelm Herschel .
Web links
Commons : NGC 781 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- Auke Slotegraaf: NGC 781. Deep Sky Observer's Companion, accessed on March 17, 2016 .
- NGC 781. DSO Browser, accessed March 17, 2016 .