OptionVotes
NO
YES
1234
811
OptionProbability
Later/never
2040s
2050s
2060s
2070s
2030s
84
4
1
The cesium 133 F=3 <-> F=4 hyperfine microwave transition (no change)
Any system based on weighted averages of uncertainty or timekeeping contributions
The strontium 87 1S0 <-> 3P0 optical transition
The ytterbium 171 1S0 <-> 3P0 optical transition
Any other optical transition in ions
Any other optical transition in neutral atoms
The thorium 229 metastable nuclear optical transition (any realization)
39
22
12
8
5
2
