NGC 521

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Galaxy
NGC 521
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Image of the spiral galaxy NGC 521 with the help of the 81 cm mirror telescope of the Mount Lemmon Observatory.
Image of the spiral galaxy NGC 521 with the help of the 81 cm mirror telescope of the Mount Lemmon Observatory .
AladinLite
Constellation whale
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 01 h 24 m 33.82 s
declination + 01 ° 43 ′ 53 ″
Appearance
Morphological type SB (r) bc  
Brightness  (visual) 11.7 mag
Brightness  (B-band) 12.5 mag
Angular expansion 2.7 ′ × 2.4 ′
Position angle 38 °
Surface brightness 13.6 mag / arcmin²
Physical data
Affiliation NGC 533 group  
Redshift 0.016738 ± 0.000013  
Radial velocity 5018 ± 4 km / s  
Stroke distance
v rad  / H 0
(227 ± 16)  x  10 6  ly
(69.6 ± 4.9)  Mpc 
history
discovery William Herschel
Discovery date October 8, 1785
Catalog names
NGC  521 • UGC  962 • PGC  5190 • CGCG  385-106 • MCG  + 00-04-118 • IRAS  01219 + 0128 • 2MASX  J01243377 + 0143532 • GC  304 • H  II 461 • h  115 • LDCE 87 NED002

NGC 521 is a barred spiral galaxy of the Hubble type SBbc in the constellation Whale south of the ecliptic . It is an estimated 227 million light years away from the Milky Way and has a diameter of about 175,000 ly.
In the same area of ​​the sky are the galaxies NGC 533 , IC 103 , IC 105 , IC 1694 .

The supernovae SN 1966G (Type-I), SN 1982O and SN 2006G (Type-SN.II / IIb) were discovered here.

The object was discovered on October 8, 1785 by the German-British astronomer Wilhelm Herschel .

Web links

Commons : NGC 521  - collection of images, videos, and audio files

Individual evidence

  1. a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e f SEDS : NGC 521
  3. Simbad
  4. Seligman