Answer · HD 139139, the "Random Transiter"
Short-lived dark spots that appear within half an hour, last a few hours and vanish.
Short-lived dark spots that appear within half an hour, last a few hours and vanish.
Where it stands
Still possibleIts tests haven't settled it: one piece of evidence for, none against. It needs two reviews to be accepted.
What it predicts
- Dip depth depends on wavelength according to spot temperature.
- Similar events in other stars, now unrecognised.
What would rule it out
- Colour-independent dips, or a physical argument that spots cannot form and dissolve so fast.
Evidence 1 for · none against
The questions it answers
Open7 answers, none ahead
Cite it
Mysteries Department. (2026). Short-lived dark spots that appear within half an hour, last a few hours and vanish. [Answer ANS0D79S5FY6FRB]. https://mysteriesdept.com/r/ANS0D79S5FY6FRB
@misc{mysteriesdept_ans0d79s5fy6frb,
title = {Short-lived dark spots that appear within half an hour, last a few hours and vanish.},
author = {{Mysteries Department}},
year = {2026},
note = {Answer, catalog key ANS0D79S5FY6FRB},
url = {https://mysteriesdept.com/r/ANS0D79S5FY6FRB}
}