(136617) 1994 CC

compiled by Wm. Robert Johnston
last updated 8 July 2009

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: 1.63899697 AU
orbital period P: 2.0983 y (=766.41792 d)
eccentricity e: 0.41755360
perihelion distance q: 0.95462788 AU
aphelion distance Q: 2.32336606 AU
inclination i: 4.684094°
argument of perihelion omega: 24.74855°
ascending node OMEGA: 325.92982°
mean anomaly M: 350.386911°
perihelion passage TP: 2009-07-08.46568
Epoch: 18 JUN 2009
data arc: 1988-2009 (209 obs.)

orbital data, second component:
semimajor axis a: 0.5 km [VO]
semimajor axis/primary radius a/Rp: (1.5)
orbital period P: (~5 h?)
eccentricity e: ?

orbital data, third component:
semimajor axis a: 1.2 km [VO]
semimajor axis/primary radius a/Rp: (3.7)
orbital period P: (~20 h?)
eccentricity e: ?

other data, primary:
diameter: 0.65 km [I9053]
absolute magnitude H: 17.671 ± 0.475 [JPL]
rotation period: 2.3886 h [I9053]
amplitude delta M: 0.09 [I9053]
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: (~0.3)
mass: ?
density: ?
type: ?

other data, second component:
diameter: 0.05 km [I9053]
diameter ratio Ds/Dp: (0.08)
component magnitude difference: (5.5)
rotation period: ?

other data, third component:
diameter: 0.10 km [I9053]
diameter ratio Ds/Dp: (0.15)
component magnitude difference: (4)
rotation period: ?

--(136617) 1994 CC--discovery and notes:

Primary discovered 3 February 1994 by the Spacewatch program at Kitt Peak Observatory; subsequently linked to observations from 1988. (136617) 1994 CC is an Apollo type asteroid and is the second identified triple system among the near-Earth population.

Second and third components identified from radar observations at Goldstone and Arecibo in June 2009. This corresponded to a close approach by (136617) 1994 CC to the Earth on 10 June 2009 at a distance of 0.016827 AU, or 6.5 times the Earth-Moon distance.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2009 by Wm. Robert Johnston.
Last modified 8 July 2009.
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