NGC 3657

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Galaxy
NGC 3657
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NGC 3657 [1]
NGC 3657
AladinLite
Constellation lion
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 11 h 23 m 55.582 s
declination + 52 ° 55 ′ 15.57 ″
Appearance
Morphological type SAB (rs) c / pec / HII  
Brightness  (visual) 12.4 mag
Brightness  (B-band) 13.1 mag
Angular expansion 1.1 '× 0.7'
Position angle 168 °
Surface brightness 12.0 mag / arcmin²
Physical data
Affiliation NGC 3631 group
LGG 241  
Redshift 0.004053 ± 0.000037  
Radial velocity 1215 ± 11 km / s  
Stroke distance
v rad  / H 0 		(57 ± 4)  ·  10 6  ly
(17.5 ± 1.2)  Mpc 
history
discovery William Herschel
Discovery date April 12, 1789
Catalog names
NGC  3657 • UGC  6406 • PGC  35002 • CGCG  268-030 • MCG  + 09-19-065 • IRAS  F11211 + 5311 • 2MASX  J11235555 + 5255155 • GC  2398 • H  III 768 • h  876 • 2MASS J11235558 + 5255155 • WISEA J112355. 58 + 525515.4 • LDCE 867 NED016

NGC 3657 is a bar-spiral galaxy with extensive star formation regions of the Hubble type SBc / P in the constellation Leo on the ecliptic . It is estimated to be 57 million light years from the Milky Way and about 20,000 light years across. Together with six other galaxies, it is considered a member of the NGC 3631 group ( LGG 241 ).

In the same area of ​​the sky are u. a. the galaxies NGC 3631 and NGC 3656 .

The object was discovered by Wilhelm Herschel on April 12, 1789 .

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 3657
  4. ^ VizieR
  5. ↑ Seligman