NGC 644

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Galaxy
NGC 644
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NGC 644 [1]
NGC 644
AladinLite
Constellation Phoenix
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 01 h 38 m 52.96 s
declination -42 ° 35 ′ 07.0 ″
Appearance
Morphological type SB (s) c  
Brightness  (visual) 14.1 mag
Brightness  (B-band) 14.8 mag
Angular expansion 1.3 ′ × 0.6 ′
Position angle 155 °
Surface brightness 13.7 mag / arcmin²
Physical data
Affiliation SSRS group 42  
Redshift 0.020784 ± 0.000033  
Radial velocity 6231 ± 10 km / s  
Stroke distance
v rad  / H 0 		(275 ± 19)  x  10 6  ly
(84.3 ± 5.9)  Mpc 
history
discovery John Herschel
Discovery date September 5, 1834
Catalog names
NGC  644 • PGC  6097 • ESO  244-043 • MCG  -07-04-027 • IRAS  1367-4250 • 2MASX  J01385297-4235071 • SGC  13645-4250.3 • GALEX ASC J013853.00-423506.4 • LDCE 102 NED003

NGC 644 is a bar-spiral galaxy of the Hubble type SBc in the constellation Phoenix in the southern sky . It is an estimated 275 million light years away from the Milky Way and is about 105,000 light years in diameter. Presumably it forms a gravitationally bound galaxy pair together with NGC 641 .

The Type Ia supernova SN 2011gm was observed here.

The object was discovered by John Herschel on September 5, 1834 .

Web links

Commons : NGC 644  - collection of images, videos, and audio files

Individual evidence

  1. ^ Aladin Lite
  2. ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  3. ↑ a b c d e f SEDS : NGC 644
  4. ↑ Simbad
  5. ↑ Seligman