NGC 817
| Galaxy NGC 817 |
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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 07 m 33.7 s |
| declination | + 17 ° 12 ′ 10 ″ |
| Appearance | |
| Morphological type | S? |
| Brightness (visual) | 13.2 mag |
| Brightness (B-band) | 14.1 mag |
| Angular expansion | 0.7 ′ × 0.3 ′ |
| Position angle | 27 ° |
| Surface brightness | 11.4 mag / arcmin² |
| Physical data | |
| Redshift | 0.015057 +/- 0.000017 |
| Radial velocity | 4514 +/- 5 km / s |
|
Stroke distance v rad / H 0 |
(205 ± 14) · 10 6 ly (63.0 ± 4.4) Mpc |
| history | |
| discovery | Lewis A. Swift |
| Discovery date | September 2, 1886 |
| Catalog names | |
| NGC 817 • UGC 1611 • PGC 8109 • CGCG 461-047 • MCG + 03-06-033 • IRAS 02048 + 1657 • 2MASX J02073371 + 1712093 • | |
NGC 817 is a galaxy of Hubble type S? in the constellation Aries on the ecliptic . It is an estimated 205 million light years from the Milky Way and has a diameter of about 40,000 ly.
The object was on 2 September 1886 by the astronomer Lewis A. Swift using a 40-cm - telescope discovered.