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Royal Observatory Greenwich [select site]
| Country | United Kingdom |
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| Latitude | 51° 28' 40.12" N |
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| Longitude | 00° 00' 05.31" W |
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| Elevation | 46m |
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| Light pollution | extreme |
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| Limiting magnitude | 4.2 |
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| Maps (open on google) |
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{"elevation":46,"name":"Royal Observatory Greenwich","latitude":51.477811,"longitude":-0.001475,"timezone":"Europe\/London","aliases":[],"lightpollution":13,"country":"United Kingdom"}