NGC 4217
| Galaxy NGC 4217 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Hunting dogs |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 15 m 50.9 s |
| declination | + 47 ° 05 ′ 30 ″ |
| Appearance | |
| Morphological type | SAb sp / HII |
| Brightness (visual) | 11.3 mag |
| Brightness (B-band) | 12.1 mag |
| Angular expansion | 5.2 ′ × 1.5 ′ |
| Position angle | 50 ° |
| Surface brightness | 13.4 mag / arcmin² |
| Physical data | |
| Affiliation | UMa group NGC 3992 group LGG 258 |
| Redshift | 0.003426 ± 0.000010 |
| Radial velocity | 1027 ± 3 km / s |
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Stroke distance v rad / H 0 |
(49 ± 3) x 10 6 ly (14.9 ± 1.0) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 10, 1788 |
| Catalog names | |
| NGC 4217 • UGC 7282 • PGC 39241 • CGCG 243-053 • MCG + 08-22-087 • IRAS F12133 + 4722 • 2MASX J12155089 + 4705304 • GC 2807 • H II 748 • h 1149 • LDCE 867 NED092 • HOLM 354A | |
NGC 4217 is a spiral galaxy of Hubble type Sb in the constellation Canes Venatici on the northern sky . It is estimated to be 49 million light years from the Milky Way and about 75,000 light years in diameter. The object is a so-called edge-on galaxy , i. H. we see them exactly at the edge. The spiral arms appear here only as dark dusty clouds, illuminated by the bright center of the galaxy. Together with NGC 4226 , it forms the optical pair of galaxies Holm 354 .
In the same area of the sky are u. a. the galaxies NGC 4220 , NGC 4231 , NGC 4232 , NGC 4248 .
UV absorption ( GALEX )
High-resolution detail of the Hubble space telescope
The object was discovered on April 10, 1788 by the astronomer Wilhelm Herschel with the help of his 18.7 inch mirror telescope.