NGC 4988

from Wikipedia, the free encyclopedia
Galaxy
NGC 4988
{{{Card text}}}
{{{Caption}}}
Photo-request.svg
AladinLite
Constellation centaur
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 13 h 09 m 54.4 s
declination -43 ° 06 ′ 21 ″
Appearance
Morphological type S0-a  
Brightness  (visual) 13.0 likes
Brightness  (B-band) 13.9 likes
Angular expansion 1.7 ′ × 0.5 ′
Position angle 26 °
Surface brightness 12.7 mag / arcmin²
Physical data
Redshift 0.006995 +/- 0.000140  
Radial velocity 2097 +/- 42 km / s  
Stroke distance
v rad  / H 0
(86 ± 6)  ·  10 6  ly
(26.4 ± 1.9)  Mpc 
history
discovery John Herschel
Discovery date June 3, 1834
Catalog names
NGC  4988 • PGC  45671 • ESO  269-055 • MCG  -07-27-037 • IRAS  13070-4250 • 2MASX  J13095440-4306204 • SGC  130702-4250.4 • GC  3425 • h  3470 • GALEX ASC J130954.38-430620.5

NGC 4988 is a 13.0 mag bright lens-shaped galaxy of the Hubble type "S0-a" in the constellation Centaur in the southern sky . It is estimated to be 86 million light years away from the Milky Way and has a diameter of around 45,000 ly.
In the same area of ​​the sky is the galaxy NGC 5011 .

The object was discovered on June 3, 1834 by John Herschel with an 18-inch reflector telescope, who described it as "vF, S, E, possibly a small group of stars, but I think it is nebulous".

Web links

  • NGC 4988. SIMBAD, accessed February 23, 2015 .
  • NGC 4988. DSO Browser, accessed February 23, 2015 .

Individual evidence

  1. a b c NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e f SEDS : NGC 4988
  3. Auke Slotegraaf: NGC 4988. Deep Sky Observer's Companion, accessed on February 23, 2015 (English).
  4. Seligman