NGC 7556
Galaxy NGC 7556 |
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SDSS recording | |
AladinLite | |
Constellation | fishes |
Position equinox : J2000.0 , epoch : J2000.0 |
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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 .