Evolution of osculating orbital elements of Linus for the model with χ² = 6695 (from Table 2). From bottom to top: a₁ semimajor axis, e₁ eccentricity, i₁ inclination, Ω₁ longitude of the ascending node, and ϖ₁ longitude of pericentre. The reference frame is related to the equator of (22) Kalliope; the epoch T₀ = 2459546.692102 (TDB). The model includes multipoles (ℓ = 2), internal tides, and external tides. Over the time span of astrometric observations (2001–2021), it exhibits two nodal precession cycles.