NGC 4957

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Galaxy
NGC 4957
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SDSS
SDSS
AladinLite
Constellation Berenike's hair
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 13 h 05 m 12.4 s
declination + 27 ° 34 ′ 11 ″
Appearance
Morphological type E3 / HII  
Brightness  (visual) 13.0 likes
Brightness  (B-band) 14.0 mag
Angular expansion 1.2 ′ × 1.0 ′
Position angle 100 °
Surface brightness 13.2 mag / arcmin²
Physical data
Affiliation Abell 1656
Coma-Cluster
WBL 426-148  
Redshift 0.023046 ± 0.000050  
Radial velocity 6909 ± 15 km / s  
Stroke distance
v rad  / H 0
(310 ± 22)  x  10 6  ly
(94.9 ± 6.6)  Mpc 
history
discovery Wilhelm Herschel
Discovery date April 11, 1785
Catalog names
NGC  4957 • UGC  8178 • PGC  45253 • CGCG  160-130 • MCG  + 05-31-124 • 2MASX  J13051235 + 2734113 • GC  3396 • H  II 397 • h  1526 • GALEX ASC J130512.48 + 273412.1 • LDCE 926 NED074

NGC 4957 is a 13.0 likes bright elliptical galaxy with extensive star formation from Hubble type E3 in the constellation Coma Berenices the northern sky . It is an estimated 310 million light years away from the Milky Way and has a diameter of about 110,000 ly. The galaxy is considered a member of the Coma galaxy cluster .
In the same area of ​​the sky are u. a. the galaxies NGC 4934 , NGC 4943 , NGC 4960 , IC 4133 .

The object was discovered on April 11, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "F, S".

Web links

Individual evidence

  1. a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e f SEDS : NGC 4957
  3. Seligman
  4. Auke Slotegraaf: NGC 4957. Deep Sky Observer's Companion, accessed on February 22, 2015 (English).