(5481) Kiuchi

compiled by Wm. Robert Johnston
last updated 28 November 2008

Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):

orbital data, primary (osculating elements) [JPL]:
semimajor axis a: 2.3392372 AU
orbital period P: 3.58 y (=1,306.802 d)
eccentricity e: 0.0617738
perihelion distance q: 2.1947336 AU
aphelion distance Q: 2.4837408 AU
inclination i: 5.95852°
argument of perihelion omega: 251.11059°
ascending node OMEGA: 326.15091°
mean anomaly M: 337.42984°
perihelion passage TP: 2008-08-03.930
Epoch: 14 MAY 2008
data arc: 1970-2003 (250 obs.)

orbital data, secondary:
semimajor axis a: (20 km?)
semimajor axis/primary radius a/Rp: (4?)
orbital period P: 20.90 ± 0.01 h [C1339]
eccentricity e: ?

other data, primary:
diameter: (10 km?)
absolute magnitude H: 12.98 ± 0.1 [C1339]
rotation period: 3.6196 ± 0.0002 [C1339]
amplitude delta M: 0.10 [C1339]
color index U-B: ?
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: (0.10) assumed
mass: ?
density: ?
type: ?

other data, secondary:
diameter: (3.3 km?)
diameter ratio Ds/Dp: 0.33 ± 0.02 [C1339]
component magnitude difference: (2.4)
rotation period: ?

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

Primary discovered 15 February 1990 by Endate and Watanabe at Kitami; linked to prediscovery observations from 1970. Alternate designations 1990 CH, 1970 SR.

Secondary identified by P. Kusnirak, P. Pravec, J. Oey, R. Stephens, M. Husarik, and J. Ries based on lightcurve observations from Ondrejov, Leura, GMARS, Skalnate Pleso, and McDonald Obseratory from 13 March-6 April 2008; announced 15 April 2008.

See more information and links at Asteroid/Comet Connection Catchall Catalog page

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2008 by Wm. Robert Johnston.
Last modified 28 November 2008.
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