(25021) Nischaykumar

--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: 2.3183904228 AU orbital period P: 3.530108577 yr (= 1289.3721577 d) eccentricity e: 0.100530669 perihelion distance q: 2.085321083 AU aphelion distance Q: 2.5514597627 AU inclination i: 3.784506° argument of perihelion ω: 108.475001° ascending node Ω: 188.553275° mean anomaly M: 198.020834° perihelion passage TP: 2023 Feb 01.142853 Epoch: 2021 Jul 01 data arc: 1977-2021 (905 obs.) Earth MOID: 1.0729 AU Jupiter Tisserand invariant TJ: 3.57 orbital data, secondary: semimajor axis as: 4.4 km [*E] separation/primary radius as/rp: 4.8 [P19a] separation/Hill radius as/rH: 0.013 [*E] orbital period Ps: 0.97898 ± 0.00002 d [P19a] eccentricity es: 0.00 [P19a] normalized ang. mom. αL: 1.09 [P19a]

other data, system (combined): absolute mag. H: 15.73 [MPC] 15.94 ± 0.03 [P19a] slope parameter G: (0.15) [*A] effective diameter dE: 2.1 ± 0.6 km [P19a] geometric albedo: 0.16 ± 0.08 [P19a] color index U-B: ? color index B-V: ? color index V-R: 0.507 ± 0.013 [P19a] taxonomic type: ? mass m: ? density ρ: (1.6 g/cm3) [*A] Hill radius rH: 330 km [*E] other data, primary: diameter dp: 2 ± 0.6 km [P19a] axial ratios a/b, b/c: 1.05, ? [P19a] rotation period RPp: 2.5344 ± 0.0012 h [P19a] amplitude in mag., rotational ΔM: 0.07 ± 0.04 [P19a] pole direction Β, λ: 284 ± 21° , -86 ± 21° [P19a] other data, secondary: diameter ds: 0.56 km [*D] axial ratios a/b, b/c: 1.46;? [P19a] diameter ratio ds/dp: 0.28 ± 0.03 [P19a] component mag. difference ΔM: <2.76 [*D] rotation period RPs: 23.5 h [P19a]