PGC 9823
| Galaxy LEDA / PGC 9823 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | triangle |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 34 m 48.1 s |
| declination | + 32 ° 50 ′ 29 ″ |
| Appearance | |
| Morphological type | S0 |
| Brightness (visual) | 14.5 mag |
| Brightness (B-band) | 15.5 mag |
| Angular expansion | 0.4 ′ × 0.2 ′ |
| Position angle | 166 ° |
| Surface brightness | 11.6 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 973 group LGG 66 |
| Redshift | 0.014462 ± 0.000100 |
| Radial velocity | 4336 ± 30 km / s |
|
Stroke distance v rad / H 0 |
(198 ± 14) · 10 6 ly (60.8 ± 4.3) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | November 22, 1827 |
| Catalog names | |
| NGC 978B • UGC 2057 NOTES01 • PGC 9823 • CGCG 505-018 NED02 • MCG + 05-07-017 • | |
LEDA / PGC 9823 (also NGC 978B ) is an elliptical dwarf galaxy of the Hubble type E / S0 in the constellation Triangulum in the northern sky . It is estimated to be 198 million light-years from the Milky Way and about 20,000 light-years across. Together with NGC 978 , it forms a bound galaxy pair.
In the same area of the sky are the galaxies NGC 969 , NGC 970 , NGC 973 , NGC 974 .
The object was discovered by John Herschel on November 22nd, 1827 .