NGC 821

from Wikipedia, the free encyclopedia
Galaxy
NGC 821
{{{Card text}}}
NGC 821 [1]
NGC 821
AladinLite
Constellation Aries
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 02 h 08 m 21.14 s
declination + 10 ° 59 ′ 41.7 ″
Appearance
Morphological type E6?  
Brightness  (visual) 10.8 mag
Brightness  (B-band) 11.8 mag
Angular expansion 2.4 ′ × 1.7 ′
Position angle 25 °
Surface brightness 12.4 mag / arcmin²
Physical data
Affiliation isolated  
Redshift 0.005787 ± 0.000014  
Radial velocity 1735 ± 4 km / s  
Stroke distance
v rad  / H 0 		(80 ± 6)  ·  10 6  ly
(24.6 ± 1.7)  Mpc 
history
discovery Wilhelm Herschel
Discovery date September 4, 1786
Catalog names
NGC  821 • UGC  1631 • PGC  8160 • CGCG  438-033 • MCG  + 02-06-034 • 2MASX  J02082114 + 1059415 • GC  487 • H  I 152 • h  193 • 2MASS J02082113 + 1059417 • KIG 89

NGC 821 is an elliptical galaxy of Hubble type E6 in the constellation Aries on the ecliptic . It is estimated to be 80 million light-years from the Milky Way and about 55,000 light-years across.

The object was discovered by Wilhelm Herschel on September 4, 1786 .

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 821
  4. ↑ Seligman