IC 3644

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Galaxy
IC 3644
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IC 3644 & IC 3646 (o) [1]
IC 3644 & IC 3646 (o)
AladinLite
Constellation Berenike's hair
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 12 h 40 m 36.233 s
declination + 26 ° 30 ′ 16.61 ″
Appearance
Morphological type S? / HII  
Brightness  (visual) 14.9 mag
Brightness  (B-band) 15.7 mag
Angular expansion 0.90 'x 0.2'
Position angle 15 °
Surface brightness 12.9 mag / arcmin²
Physical data
Redshift 0.022122 ± 0.000060  
Radial velocity 6632 ± 18 km / s  
Stroke distance
v rad  / H 0 		(296 ± 21)  x  10 6  ly
(90.8 ± 6.4)  Mpc 
history
discovery Max Wolf
Discovery date March 23, 1903
Catalog names
IC  3644 • PGC  42479 • MCG  + 05-30-052 • KUG  1238 + 267A • 2MASX  J12403619 + 2630207 • 2MASS J12403616 + 2630168 • GALEX ASC J124036.15 + 263018.1 • NSA 141862

IC 3644 is a spiral galaxy of the Hubble type Sb with extensive star formation areas in the constellation Coma Berenices in the northern sky . It is an estimated 296 million light years away from the Milky Way and about 80,000 light years in diameter. Presumably it forms a gravitationally bound galaxy pair together with IC 3646 . In the same area of ​​the sky are u. a. the galaxies IC 3632 , IC 3640 , IC 3641 , IC 3642 .

The object was discovered by Max Wolf on March 23, 1903 .

Web links

Individual evidence

  1. ^ Aladin Lite
  2. ↑ a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  3. ↑ a b c d e f SEDS : IC 3644
  4. ↑ Seligman