NGC 3398

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Galaxy
NGC 3398
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SDSS recording
SDSS recording
AladinLite
Constellation Big Bear
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 10 h 51 m 31.4 s
declination + 55 ° 23 ′ 27 ″
Appearance
Morphological type SA: (s:) b?  
Brightness  (visual) 13.6 mag
Brightness  (B-band) 14.5 mag
Angular expansion 1.0 × 0.3
Position angle 78 °
Surface brightness 12.1 mag / arcmin²
Physical data
Redshift 0.009560 ± 0.000130  
Radial velocity (2866 ± 39) km / s  
Stroke distance
v rad  / H 0
(131 ± 9)  ·  10 6  ly
(40.1 ± 2.9)  Mpc 
history
discovery Wilhelm Herschel
Discovery date April 17, 1789
Catalog names
NGC  3398 • IC  644 • UGC  5954 • PGC  32564 • CGCG  267-018 • MCG  + 09-18-038 • 2MASX  J10513147 + 5523277 • GC  2219 • H  III 792 •

NGC 3398 = IC 644 is a spiral galaxy with extensive star formation regions of the Hubble type Sa in the constellation Great Bear in the northern sky . It is estimated to be 131 million light years from the Milky Way .

The object was discovered by Wilhelm Herschel on April 17, 1789 .

Web links

Individual evidence

  1. a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e f SEDS : NGC 3398
  3. Seligman