NGC 521
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 . | |
AladinLite | |
Constellation | whale |
Position equinox : J2000.0 , epoch : J2000.0 |
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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