NGC 7717
| Galaxy NGC 7717 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Aquarius |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 23 h 37 m 43.7 s |
| declination | -15 ° 07 ′ 07 ″ |
| Appearance | |
| Morphological type | (R) SB (r) 0 / a |
| Brightness (visual) | 12.8 mag |
| Brightness (B-band) | 13.7 mag |
| Angular expansion | 1.4 '× 1.2' |
| Position angle | 8 ° |
| Surface brightness | 13.2 mag / arcmin² |
| Physical data | |
| Redshift | 0.011568 ± 0.000073 |
| Radial velocity | 3468 ± 22 km / s |
|
Stroke distance v rad / H 0 |
(158 ± 11) · 10 6 ly (48.5 ± 3.4) Mpc |
| history | |
| discovery | Ernst Leberecht Temple |
| Discovery date | 1876 |
| Catalog names | |
| NGC 7717 • PGC 71941 • MCG -03-60-008 • 2MASX J23374368-1507065 • GALEXASC J233743.71-150706.8 | |
NGC 7717 is a lenticular galaxy of the Hubble type SB0 / a in the constellation Aquarius on the ecliptic . It is estimated to be 158 million light years from the Milky Way and about 65,000 light years in diameter.
The object was discovered in 1876 by Ernst Wilhelm Leberecht Tempel with his 18.7 inch reflector telescope and later included in his New General Catalog by Johan Dreyer .