NGC 1687

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Galaxy
NGC 1687
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NGC 1687 [1]
NGC 1687
AladinLite
Constellation Digger
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 04 h 51 m 21.37 s
declination -33 ° 56 ′ 20.5 ″
Appearance
Morphological type SAB (rs) b / HII  
Brightness  (visual) 13.9 likes
Brightness  (B-band) 14.7 mag
Angular expansion 1.3 ′ × 0.5 ′
Position angle 40 °
Surface brightness 13.3 mag / arcmin²
Physical data
Redshift 0.018306 ± 0.000030  
Radial velocity 5488 ± 9 km / s  
Stroke distance
v rad  / H 0 		(238 ± 17)  x  10 6  ly
(73.0 ± 5.1)  Mpc 
history
discovery John Herschel
Discovery date January 8, 1836
Catalog names
NGC  1687 • PGC  16166 • ESO  361-013 • MCG  -06-11-005 • IRAS  F04494-3401 • 2MASX  J04512135-3356204 • SGC  044931-3401.3 • 2MASS J04512138-3356201 • NVSS J045120-335629

NGC 1687 is a lenticular galaxy of the Hubble type SBab with extensive star formation regions in the constellation Caelum in the southern sky . It is estimated to be 238 million light years from the Milky Way and about 100,000 light years in diameter .

The object was discovered on January 8, 1836 by the astronomer John Herschel .

Web links

Individual evidence

  1. ^ Aladin Lite
  2. ↑ a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  3. ↑ a b c d e f SEDS : NGC 1687
  4. ↑ Seligman