NGC 4940

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Galaxy
NGC 4940
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AladinLite
Constellation centaur
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 13 h 05 m 00.2 s
declination -47 ° 14 ′ 13 ″
Appearance
Morphological type Sat  
Brightness  (visual) 12.4 mag
Brightness  (B-band) 13.3 mag
Angular expansion 1.0 ′ × 1.0 ′
Surface brightness 12.3 mag / arcmin²
Physical data
Affiliation LGG 318  
Redshift 0.016965 ± 0.000107  
Radial velocity 5086 ± 32 km / s  
Stroke distance
v rad  / H 0
(220 ± 15)  ·  10 6  ly
(67.3 ± 4.7)  Mpc 
history
discovery John Herschel
Discovery date March 3, 1837
Catalog names
NGC  4940 • PGC  45235 • ESO  269-042 • IRAS  13021-4658 • 2MASX  J13050026-4714129 • SGC  130207-4658.1 • GC  3382 • h  3457 • GALEX ASC J130500.25-471411.0 • LDCE 934 NED005

NGC 4940 is a 12.4 mag bright spiral galaxy of the Hubble type Sa in the constellation Centaur in the southern sky . It is around 220 million light years away from the Milky Way and has a diameter of around 65,000 light years.

The object was discovered on March 3, 1837 by John Herschel with an 18-inch reflector telescope, who noted "F, S, R, 15 arcseconds, The following of two". The first object, mistakenly mistaken for a galaxy, is the asterism NGC 4937 .

Web links

Individual evidence

  1. a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e SEDS : NGC 4940
  3. Seligman
  4. Auke Slotegraaf: NGC 4940. Deep Sky Observer's Companion, accessed on February 22, 2015 (English).