(1045) Michela

--Orbital and physical data--

(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary: main belt asteroid orbital data, primary (osculating elements) [JPL] : semimajor axis a: 2.35871466254 AU orbital period P: 3.62260775443 yr (= 1323.15748231 d) eccentricity e: 0.15831379752 perihelion distance q: 1.9852975871 AU aphelion distance Q: 2.73213173803 AU inclination i: 0.263883538° argument of perihelion ω: 167.5143059° ascending node Ω: 267.1463024° mean anomaly M: 301.68944459° perihelion passage TP: 2026 Jun 23.3167992 Epoch: 2025 Nov 21 data arc: 1953-2026 (5820 obs.) Earth MOID: 0.999849 AU Jupiter Tisserand invariant TJ: 3.536 orbital data, secondary: semimajor axis as: 25 km [M26b] separation/primary radius as/rp: 8.2 [*E] separation/Hill radius as/rH: 0.024 [*E] orbital period Ps: 2.2 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 13.03 [MPC] slope parameter G: (0.15) [*A] effective diameter dE: 6.1 ± 0.27 km [M19a] geometric albedo: 0.328 ± 0.077 [M19a] color index U-B: ? color index B-V: ? taxonomic type: S (SMASSII) [B02e] mass m: ? density ρ: (2 g/cm3) [*A] Hill radius rH: 1000 km [*E] other data, primary: diameter dp: 6.1 ± 0.27 km [M19a] dimensions : 10.0 x 3.7 km [M26b] axial ratios a/b, b/c: 2.7, ? [*D] rotation period RPp: 2.701 ± 0.0002 h [B19k] amplitude in mag., rotational ΔM: 0.06 ± 0.02 [B19k] pole direction Β, λ: ? , ? other data, secondary: diameter ds: >2.2 km [M26b] diameter ratio ds/dp: 0.36 [*D] component mag. difference ΔM: 2.21 [*D] rotation period RPs: ?