NGC 6818
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Planetary nebula data from NGC 6818 |
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Sagittarius |
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Position equinox : J2000.0 |
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| Right ascension | 19h 43m 57.7s |
| declination | -14 ° 9 ′ 11 ″ |
| Appearance | |
| Apparent brightness (visual) | 9.3 mag |
| Apparent brightness (B-band) | 9.9 likes |
| Angular expansion | 0.77 ′ × 0.77 ′ |
| Central star | |
| designation | HD 186282 |
| Physical data | |
| Radial velocity | −13.8 km / s |
| distance | 6000 ly |
| history | |
| discovery | William Herschel |
| Date of discovery | August 8, 1787 |
| Catalog names | |
| NGC 6818 • PK 25-17.1 • GC 4510 • H IV 51 • h 2047 • CS = 13.1 • Bennett 123 | |
NGC 6818 is the name of a planetary nebula in the constellation Sagittarius . NGC 6818 has a magnitude of 9.3 mag and an angular extent of 0.77 '.
The object was discovered on August 8, 1787 by the German-British astronomer Wilhelm Herschel .