Public index · Planetary
Psyche 45.42 seconds
45.42 s
Measured
Zhou & Yang 1982 sidereal period of (16) Psyche: 4h 11m 45.42s ± 0.01s
A 1982 paper measured Psyche’s sidereal day as 4 hours 11 minutes 45.42 seconds, plus or minus a hundredth. Four oppositions. The hundredths can move.
What it supports
Zhou Xing-hai and Yang Xiu-yi, Chinese Astronomy and Astrophysics 6 (1982) 57–59. Direct rotation. Pole given. A genuine published print ending in.42. Distinct from the later ~4.2 hour synodic day on the other card.
What it does not
Not an invariant of the asteroid. Not the same object as ~4.2 h.42 fragments from light-time or Julian dates.
ExactnessApproximate
FormOther form
Unitseconds (historical print)
Strengthhard
When1982