| Stony Ridge Observatory | |||||
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| Code | 671 | ||||
| Location | Angeles National Forest Los Angeles Co., CA, USA |
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| Altitude | 1,730 m (5,676 ft) | ||||
| Established | 1963 | ||||
| Website Stony Ridge Observatory |
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Stony Ridge Observatory is an astronomical observatory built by and for amateur astronomers in the mountains of Los Angeles County, California in 1963.[1] When installed, its 760 mm (30 in) Newtonian-Cassegrain likely ranked as the largest amateur telescope in the United States.[2] Asteroids 10168 Stony Ridge and 144633 Georgecarroll were discovered at the observatory. In September 2009, Stony Ridge was at risk of being lost to a wildfire, but escaped with minimal damage.[2]