NGC 4242
| Galaxy NGC 4242 |
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|---|---|
.jpg)
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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 17 m 30.2 s |
| declination | + 45 ° 37 ′ 09 ″ |
| Appearance | |
| Morphological type | SAB (s) dm |
| Brightness (visual) | 10.9 likes |
| Brightness (B-band) | 11.5 likes |
| Angular expansion | 5.2 ′ × 4.0 ′ |
| Position angle | 25 ° |
| Surface brightness | 14.0 mag / arcmin² |
| Physical data | |
| Redshift | 0.001688 ± 0.000007 |
| Radial velocity | 506 ± 2 km / s |
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Stroke distance v rad / H 0 |
(25 ± 2) x 10 6 ly (7.67 ± 0.54) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | April 10, 1788 |
| Catalog names | |
| NGC 4242 • UGC 7323 • PGC 39423 • CGCG 243-061 • MCG + 08-22-098 • 2MASX J12173687 + 4753209 • GC 2830 • H III 725 • h 1166 • USGC U480 NED25 | |
NGC 4242 is a barred spiral galaxy of the Hubble type SBd in the constellation Hounds in the northern sky . It is estimated to be 25 million light years from the Milky Way and about 35,000 ly in diameter.
The Type IIn (?) Supernova SN 2002bu was observed here.
The object was discovered on April 10, 1788 by the astronomer William Herschel with the help of his 18.7-inch telescope.
Web links
Commons : NGC 4242 - collection of images, videos, and audio files
