NGC 4756

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Galaxy
NGC 4756
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AladinLite
Constellation Crow
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 12 h 52 m 52.6 s
declination -15 ° 24 ′ 48 ″
Appearance
Morphological type SAB (s) 0 ^ 0 ^? / cD  
Brightness  (visual) 12.4 mag
Brightness  (B-band) 13.4 mag
Angular expansion 1.7 ′ × 1.3 ′
Position angle 50 °
Surface brightness 13.1 mag / arcmin²
Physical data
Affiliation Abell 1631
NGC 4756 Group
LGG 306  
Redshift 0.013599 ± 0.000063  
Radial velocity 4077 ± 19 km / s  
Stroke distance
v rad  / H 0
(177 ± 12)  ·  10 6  ly
(54.2 ± 3.8)  Mpc 
history
discovery Wilhelm Herschel
Discovery date February 8, 1785
Catalog names
NGC  4756 • PGC  43725 • MCG  -02-33-039 • 2MASX  J12525262-1524478 • GC  3276 • H  III 281 • h  1464 • LDCE 921 NED029

NGC 4756 is an elliptical cD galaxy of the Hubble type E / S0 in the constellation Raven south of the ecliptic . It is estimated to be 177 million light years from the Milky Way and about 90,000 light years across .
The galaxies IC 829 and IC 3831 are located in the same area of ​​the sky .

The object was discovered on February 8, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “vF, pS, resolvable”.

Web links

Individual evidence

  1. a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e f SEDS : NGC 4756
  3. ^ VizieR
  4. Seligman
  5. Auke Slotegraaf : NGC 4756. Deep Sky Observer's Companion, accessed on February 4, 2015 (English).