NGC 6633
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| AladinLite | |
| Constellation | Snake bearer |
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Position equinox : J2000.0 |
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|---|---|
| Right ascension | 18 h 27 m 15.2 s |
| declination | + 06 ° 30 ′ 30 ″ |
| Appearance
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| classification | III2m |
| Brightness (visual) | 4.6 likes |
| Angular expansion | 20.0 ' |
| Physical data
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| Affiliation | Milky Way |
| distance | 1225 ly (376 pc ) |
| diameter | 8 ly |
| history | |
| Discovered by | Jean-Philippe Loys de Chéseaux |
| Discovery time | 1745 |
| Catalog names | |
| NGC 6633 • C 1825 + 065 • OCl 90 • Mel 201 • Cr 380 • GC 4410 • H VIII 72 • COCD 446 | |
NGC 6633 is an open cluster of Trumpler type III2m in the constellation Ophiuchus on the ecliptic. It has a brightness of 4.6 mag and an angular diameter of 20 arc minutes . The cluster is about 1,000 light years away from the solar system and is about 8 light years in diameter . It contains almost 30 stars , its age is estimated at 600 - 700 million years.
The object was discovered in 1745 by Jean-Philippe de Chéseaux .