NGC 7557
Galaxy NGC 7557 |
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NGC 7557 ( SDSS image) | |
AladinLite | |
Constellation | fishes |
Position equinox : J2000.0 , epoch : J2000.0 |
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Right ascension | 23 h 15 m 39.8 s |
declination | + 06 ° 42 ′ 30 ″ |
Appearance | |
Morphological type | S. |
Brightness (visual) | 14.4 mag |
Brightness (B-band) | 15.2 mag |
Angular expansion | 0.6 '× 0.6' |
Surface brightness | 13.1 mag / arcmin² |
Physical data | |
Affiliation |
NGC 7619 group NGC 7626 group LGG 473 |
Redshift | 0.012315 ± 0.000063 |
Radial velocity | 3692 ± 19 km / s |
Stroke distance v rad / H 0 |
(172 ± 12) · 10 6 ly (52.6 ± 3.7) Mpc |
history | |
discovery | Bindon Blood Stoney |
Discovery date | September 16, 1852 |
Catalog names | |
NGC 7557 • PGC 70854 • CGCG 406-035 • MCG + 01-59-021 • 2MASX J23153974 + 0642301 • GALEX ASC J231539.70 + 064230.5 • LDCE 1573 NED003 |
NGC 7557 is a spiral galaxy of Hubble type Sa in the constellation Pisces on the ecliptic . It is estimated to be 172 million light years from the Milky Way and about 30,000 light years across . Presumably it forms a gravitationally bound galaxy pair together with NGC 7562 .
In the same area of the sky are u. a. the galaxies NGC 7518 , NGC 7577 , NGC 7583 , NGC 7591 .
The object was discovered by Bindon Blood Stoney on September 16, 1852 .