NGC 7556
| Galaxy NGC 7556 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | fishes |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 23 h 15 m 44.5 s |
| declination | -02 ° 22 ′ 53 ″ |
| Appearance | |
| Morphological type | S0- |
| Brightness (visual) | 12.7 mag |
| Brightness (B-band) | 13.7 mag |
| Angular expansion | 2.5 '× 1.6' |
| Position angle | 123 ° |
| Surface brightness | 14.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.025041 +/- 0.000087 |
| Radial velocity | 7507 +/- 26 km / s |
|
Stroke distance v rad / H 0 |
(341 ± 24) · 10 6 ly (104.5 ± 7.3) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | September 20, 1784 |
| Catalog names | |
| NGC 7556 • PGC 70855 • MCG -01-59-009 • 2MASX J23154447-0222535 • GC 2220 • H II 235 • h 4919 • LDCE 1564 NED004 | |
NGC 7556 is an elliptical galaxy of Hubble type E / S0 in the constellation Pisces on the ecliptic . It is estimated to be 341 million light-years away from the Milky Way and has a diameter of about 250,000 ly
. a. the galaxies NGC 7544 , NGC 7546 , NGC 7554 , NGC 7566 .
The object was discovered by Wilhelm Herschel on September 20, 1784 .