NGC 4020

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Galaxy
NGC 4020
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NGC 4020 [1] SDSS image
NGC 4020 SDSS image
AladinLite
Constellation Big Bear
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 11 h 58 m 56.670 s
declination + 30 ° 24 ′ 42.80 ″
Appearance
Morphological type SBd? sp  
Brightness  (visual) 12.5 mag
Brightness  (B-band) 13.2 mag
Angular expansion 1.9 ′ × 1 ′
Position angle 15 °
Surface brightness 13.0 mag / arcmin²
Physical data
Affiliation NGC 4274 group
LGG 279  
Redshift 0.002535 ± 0.000013  
Radial velocity 760 ± 4 km / s  
Stroke distance
v rad  / H 0
(34 ± 2)  x  10 6  ly
(10.3 ± 0.7)  Mpc 
history
discovery William Herschel
Discovery date February 3, 1788
Catalog names
NGC  4020 • UGC  6971 • PGC  37723 • CGCG  157-072 • MCG  + 05-28-066 • IRAS  11563 + 3041 • 2MASX  J11585693 + 3024490 • GC  2657 • H  II 725 • h  1045 • LDCE 0867 NED060 • NSA 160843

NGC 4020 is a bar-spiral galaxy of the Hubble type SBcd in the constellation Great Bear in the northern sky . It is estimated to be 34 million light years from the Milky Way and about 20,000 light years across. Together with 18 other galaxies, it forms the NGC 4274 group ( LGG 279 ).
In the same area of ​​the sky are u. a. the galaxies NGC 3971 , IC 2984 , IC 2985 , IC 2986 .

The object was discovered by Wilhelm Herschel on February 3, 1788 .

Web links

Individual evidence

  1. ^ Aladin Lite
  2. a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  3. a b c d e f SEDS : NGC 4020
  4. ^ VizieR
  5. Seligman