(216) Kleopatra, S/2008 (216) 1, and S/2008 (216) 1

compiled by Wm. Robert Johnston
last updated 25 September 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: 2.795846148 AU
orbital period P: 4.67 y (=1707.529952 d)
eccentricity e: 0.24817623
perihelion distance q: 2.10198359 AU
aphelion distance Q: 3.489708702 AU
inclination i: 13.096162°
argument of perihelion omega: 179.93664°
ascending node OMEGA: 215.51370°
mean anomaly M: 349.421575°
perihelion passage TP: 2009-01-19.17494
Epoch: 30 NOV 2008
data arc: 1880-2008 (1821 obs.)

orbital data, S/2008 (216) 1:
semimajor axis a: ?
semimajor axis/primary radius a/Rp: ?
orbital period P: ?
eccentricity e: ?
inclination i: ?

orbital data, S/2008 (216) 2:
semimajor axis a: ?
semimajor axis/primary radius a/Rp: ?
orbital period P: ?
eccentricity e: ?
inclination i: ?

other data, primary:
diameter: 217 x 94 x 81 km [JPL]
triaxial ratio a/b: -
absolute magnitude H: 7.30 [JPL]
rotation period: 5.385 h [JPL]
amplitude delta M: -
color index U-B: 0.238 ± 0.009 [JPL]
color index B-V: 0.713 ± 0.021 [JPL]
color index V-R: ?
color index R-I: ?
slope parameter G: 0.29 [JPL]
geometric albedo: 0.116 ± 0.004 [IR]
mass: ?
density: ?
type: M, Xe [JPL]

other data, S/2008 (216) 1:
diameter: ?
diameter ratio Ds/Dp: ?
component magnitude difference: ?
rotation period: ?

other data, S/2008 (216) 2:
diameter: ?
diameter ratio Ds/Dp: ?
component magnitude difference: ?
rotation period: ?

--(216) Kleopatra--discovery and notes:

Primary discovered 10 April 1880 by J. Palisa at Pola. Alternate designations A905 OA, A910 RA. In November 1999 Kleopatra was imaged by radar from Arecibo.

S/2008 (216) 1 reported 24 September 2008.

S/2008 (216) 2 reported 24 September 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 25 September 2008.
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