NGC 81
| Galaxy data from NGC 81 |
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|---|---|
![NGC 81, NGC 80 (u) & LEDA 1668790 (r) [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC81_-_SDSS_DR14.jpg)
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| NGC 81, NGC 80 (u) & LEDA 1668790 (r) SDSS image | |
| AladinLite | |
| Constellation | Andromeda |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 00 h 21 m 13.266 s |
| declination | + 22 ° 22 ′ 58.43 ″ |
| Appearance | |
| Morphological type | S. |
| Brightness (visual) | 15.7 mag |
| Brightness (B-band) | 16.5 mag |
| Angular expansion | 0.2 ′ × 0.1 ′ |
| Position angle | 84 ° |
| Surface brightness | 11.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.020447 ± 0.000070 |
| Radial velocity | 6130 ± 21 km / s |
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Stroke distance v rad / H 0 |
(281 ± 20) x 10 6 ly (86.1 ± 6.0) Mpc |
| history | |
| discovery | Ralph Copeland |
| Discovery date | November 15, 1873 |
| Catalog names | |
| NGC 81 • PGC 1352 • 2MASX J00211331 + 2222581 • 2MASS J00211329 + 2222582 • GALEX ASC J002113.31 + 222258.7 • WISEA J002113.28 + 222258.4 • NSA 126748 | |
NGC 81 is a spiral dwarf galaxy of the Hubble type S in Andromeda in the northern sky . It is estimated to be 281 million light years from the Milky Way and about 15,000 light years in diameter.
In the same area of the sky are u. a. the galaxies NGC 79 , NGC 83 , NGC 85 , NGC 86 .
The object was discovered on November 15, 1873 by the Scottish astronomer Ralph Copeland .
Web links
Commons : NGC 81 - collection of images, videos, and audio files
