NGC 4684

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Galaxy
NGC 4684
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SDSS
SDSS
AladinLite
Constellation Virgin
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 12 h 47 m 17.5 s
declination -02 ° 43 ′ 39 ″
Appearance
Morphological type SB (r) 0+ / HII  
Brightness  (visual) 11.5 likes
Brightness  (B-band) 12.4 mag
Angular expansion 2.8 ′ × 1.1 ′
Position angle 23 °
Surface brightness 12.6 mag / arcmin²
Physical data
Redshift 0.005204 ± 0.000017  
Radial velocity 1560 ± 5 km / s  
Stroke distance
v rad  / H 0
(66 ± 5)  x  10 6  ly
(20.1 ± 1.4)  Mpc 
history
discovery Wilhelm Herschel
Discovery date April 17, 1784
Catalog names
NGC  4684 • UGC  7951 • PGC  43149 • MCG  + 00-33-011 • IRAS  12447-0227 • GC  3214 • H  II 181 • h  1426 • LDCE 904 NED247

NGC 4684 is an 11.5 mag bright, lens-shaped galaxy of the Hubble-type SB0 / a in the constellation Virgo on the ecliptic . It is an estimated 66 million light years away from the Milky Way and about 60,000 light years in diameter.

In the same area of ​​the sky is u. a. the galaxy NGC 4691 .

The object was discovered on April 17, 1784 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “pF, pL, E, r”.

Web links

Individual evidence

  1. a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e SEDS : NGC 4684
  3. Seligman
  4. Auke Slotegraaf : NGC 4684. Deep Sky Observer's Companion, accessed on February 4, 2015 (English).