(44) Nysa

--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: 2.4231907048 AU orbital period P: 3.7721555562 yr (= 1377.7798169 d) eccentricity e: 0.1498776973 perihelion distance q: 2.0600084619 AU aphelion distance Q: 2.7863729477 AU inclination i: 3.71255278° argument of perihelion ω: 343.9936855° ascending node Ω: 131.4770225° mean anomaly M: 349.1062102° perihelion passage TP: 2026 Jan 01.6923437 Epoch: 2025 Nov 21 data arc: 1864-2025 (8769 obs.) Earth MOID: 1.07617 AU Jupiter Tisserand invariant TJ: 3.494 orbital data, secondary: semimajor axis as: 180 km (separation) [B26d] separation/primary radius as/rp: 4.8 [*E] separation/Hill radius as/rH: 0.013 [*E] orbital period Ps: 0.96 d [*E] eccentricity es: ? normalized ang. mom. αL: ?

other data, system (combined): absolute mag. H: 6.75 [MPC] slope parameter G: 0.46 [JPL] effective diameter dE: 75.66 ± 0.74 km [U11a] geometric albedo: 0.479 ± 0.013 [U11a] color index U-B: 0.245 [JPL] color index B-V: 0.703 [JPL] taxonomic type: Xc (SMASSII) [B02e] E (Tholen) [T89a] mass m: ? density ρ: (2.2 g/cm3) [*A] Hill radius rH: 13000 km [*E] other data, primary: diameter dp: 75.66 ± 0.74 km [U11a] dimensions : 113 x 67 x 65 km [**] axial ratios a/b, b/c: 1.69, 1.03 [*D] rotation period RPp: 6.4214175 ± 0.0000005 h [M26d] amplitude in mag., rotational ΔM: ? pole direction Β, λ: 102.7 ± 0.5° , 55.3 ± 0.5° [M26d] other data, secondary: diameter ds: 1.0 ± 0.5 km [M26d] diameter ratio ds/dp: 0.013 [*D] component mag. difference ΔM: 9 [B26d] rotation period RPs: ?