In technical terms, they librate around ( Δ λ , Δ ϖ ) {\displaystyle ({\Delta }{\lambda },{\Delta }\varpi )} = (±60°, ±60°).
I tekniska termer, libraterar de omkring ( Δ λ , Δ ϖ ) {\displaystyle ({\Delta }{\lambda },{\Delta }\varpi )}  = (±60°, ±60°).