(4411)
Asteroids with Satellites Database--Johnston's Archive
(4411) Kochibunkyo
compiled by Wm. Robert Johnston
last updated 30 April 2022
--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:**2.1672159197 AUorbital period **P:**3.1905200311 yr (= 1165.3374414 d)eccentricity **e:**0.092309867perihelion distance **q:**1.967160506 AUaphelion distance **Q:**2.367271333 AUinclination **i:**2.25493975°argument of perihelion **ω:**11.008715°ascending node **Ω:**88.438932°mean anomaly **M:**29.174216°perihelion passage **TP:2021 Oct 18.561650Epoch:2022 Jan 21data arc:1973-2022 (3417 obs.)Earth MOID:**0.984017 AUJupiter Tisserand invariant **TJ:**3.685 orbital data, secondary: semimajor axis **as:**6 km [*E]separation/primary radius **as/rp:**2.8 [*E]separation/Hill radius **as/rH:**0.0090 [*E]orbital period **Ps:**0.4994 ± 0.0004 d [B22b]eccentricity es:?normalized ang. mom. αL:? | other data, system (combined): absolute mag. **H:**14.08 [MPC]slope parameter G: (0.15) [*A]effective diameter dE:4.43 ± 0.41 km [M11b]geometric albedo:0.271 ± 0.060 [M11b]color index U-B:?color index B-V:?taxonomic type:?mass m:?density ρ: (1.6 g/cm3) [*A]Hill radius **rH:**670 km [*E] other data, primary: diameter **dp:**4.34 ± 0.40 km [*D]rotation period **RPp:**2.69614 ± 0.00006 h [B22b]amplitude in mag., rotational **ΔM:**0.16 [B22b]amplitude in mag., mutual events **ΔM:**0.07 ±0.02 [B22b]pole direction Β, λ:? , ? other data, secondary: diameter **ds:**0.91 ± 0.12 km [*D]diameter ratio **ds/dp:**0.21 ± 0.02 [B22b]component mag. difference **ΔM:**3.39 ± 0.21 [*D]rotation period RPs:? |
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-- (4411) Kochibunkyo --discovery and notes:
Primary discovered 1990 Jan 03 from Geisei, Japan by T. Seki. Alternate designation(s): 1990 AF, 1973 YL3, 1976 YP, 1979 TU2, 1979 WZ7, 1982 SF3. Linked to prediscovery observations from 1973 Dec 25. Permanent number assigned 1990 Mar 11.
Named 1995 Jul 12 for the Kochi association of education volunteers [MPC025443].
Companion discovered 2022 Feb 02 by V. Benishek, P. Pravec, and R. Durkee using lightcurve observations from Sopot Observatory, Serbia; Shed of Science South Observatory, Pontotoc, Texas, USA. Announced 2022 Apr 15 [B22b].
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© 2022 by Wm. Robert Johnston.
Last modified 30 April 2022.
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