Asteroids with Satellites Database--Johnston's Archive

(5481) Kiuchi

compiled by Wm. Robert Johnston
last updated 29 May 2019

--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: 2.339257265 AU
orbital period P: 3.577875156 yr
(= 1306.818901 d)
eccentricity e: 0.063265229
perihelion distance q: 2.191263619 AU
aphelion distance Q: 2.48725091 AU
inclination i: 5.957471248°
argument of perihelion ω: 250.4951681°
ascending node Ω: 326.1140064°
mean anomaly M: 224.0542347°
perihelion passage TP: 2015 Sep 28.4902
Epoch: 2014 May 23
data arc: 1970-2014 (1074 obs.)
Earth MOID: 1.19345 AU
Jupiter Tisserand invariant TJ: 3.555

orbital data, secondary:
binary dynamical type:A [L15a]
semimajor axis as: 14 km [*E]
separation/primary radius as/rp:4.1 [*E]
separation/Hill radius as/rH:0.012 [*E]
orbital period Ps: 0.8708 ± 0.0004 d [K08b]
eccentricity es: <0.18 [P16d]
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.2 [MPC]
12.98 ± 0.1 [K08b]
slope parameter G: (0.15) [*A]
effective diameter dE: 7.22 km [*E]
geometric albedo: (0.16 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1200 km [*E]

other data, primary:
diameter dp: 6.86 km [*E]
rotation period RPp: 3.6196 ± 0.0002 h [K08b]
amplitude in mag., rotational ΔM: 0.1 [K08b]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 2.26 km [*E]
diameter ratio ds/dp: 0.33 ± 0.02 [K08b]
component mag. difference ΔM: 2.41 ± 0.13 [*D]
rotation period RPs: ?

-- (5481) Kiuchi --discovery and notes:

Primary discovered 1990 Feb 15 from Kitami, Hokkaido, Japan by K. Endate and K. Watanabe. Alternate designation(s): 1990 CH, 1970 SR. Linked to prediscovery observations from 1970 Sep 27. Permanent number assigned 1993 Mar 08.

Named 1993 Sep 01 for Tsuruhiko Kiuchi (1954-) [MPC022510].

Companion discovered 2008 Mar 13 by P. Kusnirak, P. Pravec, J. Oey, R. Stephens, M. Husarik, and J. Ries using lightcurve observations from Ondrejov Observatory, Czech Republic; Leura, New South Wales, Australia; Goat Mountain Astronomical Research Station, Yucca Valley, California, USA; Skalnate Pleso Observatory; McDonald Observatory, Texas, USA. Announced 2008 Apr 16 [K08b].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2008-2014, 2019 by Wm. Robert Johnston.
Last modified 29 May 2019.
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