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.

References

  1. ^ MPC


Numbered comets
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138P/Shoemaker–Levy 		139P/Väisälä–Oterma Next
140P/Bowell–Skiff


Allikas: https://en.wikipedia.org/wiki/139P/V%C3%A4is%C3%A4l%C3%A4%E2%80%93Oterma
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