1806-20 may refer to:
- a position in the sky, 18h 06m −20°
- 1806-20 cluster, the star cluster containing SGR 1806-20
- LBV 1806-20, a luminous blue variable star
- SGR 1806-20, a soft gamma repeater pulsar
- A range of years from 1806 to 1820
This disambiguation page lists articles associated with the same number.
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