NGC 6504
| Galaxy NGC 6504 |
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|---|---|
![NGC 6504 [1] Hubble Space Telescope](https://de.wikipedia.org/wiki/Datei:NGC_6504_hst_07450_R814B450.png)
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| NGC 6504 Hubble Space Telescope | |
| AladinLite | |
| Constellation | Hercules |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 17 h 56 m 05.71 s |
| declination | + 33 ° 12 ′ 30.2 ″ |
| Appearance | |
| Morphological type | S. |
| Brightness (visual) | 12.6 mag |
| Brightness (B-band) | 13.5 likes |
| Angular expansion | 2.2 ′ × 0.5 ′ |
| Position angle | 94 ° |
| Surface brightness | 12.6 mag / arcmin² |
| Physical data | |
| Redshift | 0.015971 ± 0.000087 |
| Radial velocity | 4788 ± 26 km / s |
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Stroke distance v rad / H 0 |
(222 ± 16) · 10 6 ly (68.1 ± 4.8) Mpc |
| history | |
| discovery | Albert Marth |
| Discovery date | July 27, 1864 |
| Catalog names | |
| NGC 6504 • UGC 11053 • PGC 61129 • CGCG 199-029 • MCG + 06-39-027 • 2MASX J17560570 + 3312300 • GALEX ASC J175605.72 + 331230.6 • WISEA J175605.73 + 331230.4 | |
NGC 6504 is a spiral galaxy of Hubble type S in the constellation Hercules at the northern sky . It is an estimated 222 million light years away from the Milky Way and about 140,000 light years in diameter .
The object was discovered on July 27, 1864 by the astronomer Albert Marth with the help of his 48-inch mirror telescope and was later included in his New General Catalog by Johan Dreyer .