139P/Väisälä–Oterma is a periodic comet in the Solar System. When it was discovered in 1939 it was not recognized as a comet and designated as asteroid 1939 TN.
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This article is an automated import of the Wikipedia article "139P/Väisälä–Oterma", available at https://en.wikipedia.org/wiki/139P%2FV%C3%A4is%C3%A4l%C3%A4%E2%80%93Oterma . Text is licensed under CC BY-SA 4.0.