NGC 7557

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Galaxy
NGC 7557
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NGC 7557 [1] (SDSS image)
NGC 7557 ( SDSS image)
AladinLite
Constellation fishes
Position
equinox :  J2000.0 , epoch : J2000.0
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 .

Web links

Individual evidence

  1. ^ Aladin Lite
  2. ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  3. ↑ a b c d SEDS : NGC 7557
  4. ^ VizieR
  5. ↑ Seligman