IC 557

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Galaxy
IC 557
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IC 557 [1] SDSS image
IC 557 SDSS image
AladinLite
Constellation lion
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 09 h 44 m 02.400 s
declination + 10 ° 59 ′ 17.22 ″
Appearance
Morphological type S0 / a / LINER  
Brightness  (visual) 14.2 mag
Brightness  (B-band) 15.0 mag
Angular expansion 0.80 × 0.4
Position angle 42 °
Surface brightness 12.8 mag / arcmin²
Physical data
Redshift 0.020296 ± 0.000159  
Radial velocity 6085 ± 48 km / s  
Stroke distance
v rad  / H 0
(266 ± 19)  ·  10 6  ly
(81.7 ± 5.8)  Mpc 
history
discovery Stéphane Javelle
Discovery date April 22, 1892
Catalog names
IC  557 • PGC  27866 • CGCG  063-055 • MCG  + 02-25-027 • 2MASX  J09440241 + 1059174 • NSA 73930 • LDCE 667 NED008 • WISEA J094402.40 + 105917.1

IC 557 is a lens-shaped galaxy of the Hubble type S0 / a with an active galaxy core in the constellation Leo on the ecliptic . It is estimated to be 266 million light years from the Milky Way and about 60,000 light years across.

In the same area of ​​the sky are u. a. the galaxies NGC 2984 , IC 552 , IC 556 .

The object was discovered on April 22, 1892 by the astronomer Stéphane Javelle and later listed by Johan Dreyer in his index catalog .

See also

Web links

Individual evidence

  1. ^ Aladin Lite
  2. a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  3. a b c d e f SEDS : IC 557
  4. Seligman