NGC 4509
| Galaxy NGC 4509 |
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|---|---|
![NGC 4509, [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC4509_-_SDSS_DR14.jpg)
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| NGC 4509, SDSS image | |
| AladinLite | |
| Constellation | Hunting dogs |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 33 m 06.789 s |
| declination | + 32 ° 05 ′ 29.64 ″ |
| Appearance | |
| Morphological type | Sab / pec? / HII |
| Brightness (visual) | 13.4 mag |
| Brightness (B-band) | 14.2 mag |
| Angular expansion | 0.8 '× 0.5' |
| Position angle | 155 ° |
| Surface brightness | 12.3 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 4274 group LGG 279 |
| Redshift | 0.003125 ± 0.000030 |
| Radial velocity | (937 ± 9) km / s |
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Stroke distance v rad / H 0 |
(42 ± 3) x 10 6 ly (13.0 ± 0.9) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | March 11, 1828 |
| Catalog names | |
| NGC 4509 • UGC 7704 • PGC 41660 • CGCG 159-015 • MCG + 05-30-018 • IRAS 12306 + 3222 • KUG 1230 + 323 • 2MASX J12330650 + 3205273 • Mrk 773 • USGC U478 NED02 | |
NGC 4509 is a spiral dwarf galaxy of the Hubble type Sab with extensive star formation areas in the constellation Hounds in the northern sky . It is estimated to be 42 million light years from the Milky Way and about 10,000 light years in diameter. Together with 18 other galaxies, it forms the NGC 4274 group ( LGG 279 ).
The object was discovered by John Herschel on March 11, 1828 .