Asteroids with Satellites Database--Johnston's Archive

(5481) Kiuchi

compiled by Wm. Robert Johnston
last updated 21 September 2014

--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: 2.19126362 AU
aphelion distance Q: 2.487250910 AU
inclination i: 5.9574712°
argument of perihelion ω: 250.495168°
ascending node Ω: 326.114006°
mean anomaly M: 224.054235°
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 [L14c]
semimajor axis as: 15 km [*E]
separation/primary radius as/rp:4.0 [*E]
separation/Hill radius as/rH:0.012 [*E]
orbital period Ps: 0.8708 ± 0.0004 d [K08b]
eccentricity es: ?
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: 7.92 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: 1300 km [*E]

other data, primary:
diameter dp: 7.52 km [*E]
rotation period RPp: 3.6196 ± 0.0002 h [K08b]
amplitude in mag., rotational ΔM: 0.10 [K08b]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 2.48 km [*E]
diameter ratio ds/dp: 0.33 ± 0.02 [K08b]
component mag. difference ΔM: 2.4 ± 0.1 [*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-) [MPC22510].

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 by Wm. Robert Johnston.
Last modified 21 September 2014.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.