NGC 6811
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| AladinLite | |
| Constellation | swan |
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Position equinox : J2000.0 |
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| Right ascension | 19 h 38 m 17.9 s |
| declination | + 46 ° 23 ′ 20 ″ |
| Appearance
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| classification | IV3p |
| Brightness (visual) | 6.8 likes |
| Angular expansion | 15.0 ' |
| Physical data
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| distance | approx. 4000 ly (1215 pc ) |
| history | |
| Discovered by | John Herschel |
| Discovery time | August 29, 1829 |
| Catalog names | |
| NGC 6811 • OCl 185 • Mel 222 • Cr 402 • GC 4505 • h 2044 • | |
NGC 6811 is the name of an open star cluster in the constellation Swan . NGC 6811 has a diameter of 15 arc minutes and an apparent magnitude of 6.8 mag. It is around 4,000 light years away and measures around 15 light years in diameter . Its age is estimated to be 700 million years.
The object was discovered by John Herschel on August 29, 1829 .
Web links
- Two planets in transit in a star cluster. astronews.com, June 27, 2013