Here I report the expected position of the F1 keystone in vacuum and at 23 °C.

• Displacement due to buoyancy in at 23 °C: 416 µm. See klog 15322.
• Displacement due to temperature chage from 22.3 °C to 23 °C: ( 870 - 349 ) µm = 521 µm.  
  • Position of keystone in air at 23 °C: 349 µm. See klog 15322.
  • Position of keystone in air at 22.3 °C: 870 µm (at  00:35:00 UTC on the 12th of November 2020 before moving with FR).
• Position after the FR jammed: -43 um (at  00:56:00 UTC on the 12th of November 2020 with temperature 22.3 °C).

The  expected position of the F1 keystone in vacuum and at 23 °C is then: ( - 43 - 416 - 521 ) µm = - 980 µm.