NGC 1998

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Galaxy
NGC 1998
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NGC 1998 DSS.jpg
AladinLite
Constellation painter
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 05 h 33 m 15.7 s
declination -48 ° 41 ′ 44 ″
Appearance
Morphological type (R) SA (r) 0 ^ +  
Brightness  (visual) 14.3 mag
Brightness  (B-band) 15.2 mag
Angular expansion 0.9 ′ × 0.5 ′
Position angle 20 °
Surface brightness 13.3 mag / arcmin²
Physical data
Redshift 0.015137 ± 0.000107  
Radial velocity 4538 ± 32 km / s  
Stroke distance
v rad  / H 0
(194 ± 14)  ·  10 6  ly
(59.5 ± 4.2)  Mpc 
history
discovery John Herschel
Discovery date December 28, 1834
Catalog names
NGC  1998 • PGC  17434 • ESO  204-015 • 2MASX  J05331577-4841442 • SGC  053157-4843.7 • GALEX ASC J053315.79-484144.2

NGC 1998 is a lenticular galaxy of the Hubble type S0 in the constellation Painter in the southern sky . It is estimated to be 194 million light years from the Milky Way .

The object was discovered by John Herschel on December 28, 1834 .

Web links

Individual evidence

  1. a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e f SEDS : NGC 1998
  3. Seligman