Beijing Astronomical Observatory
| Alternative names | BAO | 
|---|---|
| Location | China | 
| Coordinates | 40°23′44″N 117°34′33″E / 40.39561°N 117.57578°E | 
| Altitude | 960 m (3,150 ft) | 
| Established | 1958 | 
| Website | www | 
| Telescopes | 
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Beijing Astronomical Observatory (BAO) is an observatory in Chaoyang District, Beijing, China. It was founded in 1958 and is part of the Chinese Academy of Sciences. The observatory comprises 5 observing stations. The principal observing site for optical and infrared is Xinglong Station in Xinglong County, Chengde, Hebei Province, which is around 150 kilometres northeast of Beijing.