(136617) 1994 CC

compiled by Wm. Robert Johnston
last updated 3 November 2012

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, "Beta":
semimajor axis a: 1.729 ± 0.008 km [F11a]
semimajor axis/primary radius a/Rp: (5.58)
orbital period P: 1.243 ± 0.0329 d [F11a]
eccentricity e: 0.002 ± 0.015 [F11a]
inclination i: 83.376° ± 11.158° [F11a]
argument of periapsis omega: 130.980° ± 43.647° [F11a]
ascending node OMEGA: 59.209° ± 3.910° [F11a]
mean anomaly M: 233.699° ± 43.941° [F11a]
Epoch: MJD 54994.0 [F11a]

orbital data, "Gamma":
semimajor axis a: 6.130 ± 0.108 km [F11a]
semimajor axis/primary radius a/Rp: (19.8)
orbital period P: 8.376 ± 0.404 d [F11a]
eccentricity e: 0.192 ± 0.014 [F11a]
inclination i: 71.709° ± 8.994° [F11a]
argument of periapsis omega: 96.229° ± 5.017° [F11a]
ascending node OMEGA: 48.479° ± 4.741° [F11a]
mean anomaly M: 6.070° ± 6.187° [F11a]
Epoch: MJD 54994.0 [F11a]

other data, primary:
equivalent diameter: 0.62 ± 0.06 km [B11a]
dimensions axbxc: 0.69 +0.08/-0.04 km x
0.67 +0.04/-0.08 km x
0.64 ± 0.06 km [B11a]
absolute magnitude H: 17.671 ± 0.475 [JPL]
rotation period: 2.38860 ± 0.00009 h [B11a]
amplitude delta M: 0.09 [I9053]
rotation pole: RA -30.791° ± 3.910°
DEC 6.624° ± 11.158°
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: 0.42 ± 0.10 [B11a]
mass: (25.935 ± 1.315)x1010 kg [F11a]
density: 2.1 ± 0.6 g/cm3 [B11a]
type: ?

other data, "Beta":
diameter: 0.113 ± 0.030 km [B11a]
diameter ratio Ds/Dp: (0.18)
component magnitude difference: (3.7)
rotation period: ?
mass: (0.580 ± 0.331)x1010 kg [F11a]

other data, "Gamma":
diameter: 0.080 ± 0.030 km [B11a]
diameter ratio Ds/Dp: (0.13)
component magnitude difference: (4.4)
rotation period: ?
mass: (0.0911 +0.20/-0.09)x1010 kg [F11a]

--(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.

Brozovic et al. (2011) have completed a shape model of the primary, showing it to have an equatorial ridge.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2009, 2012 by Wm. Robert Johnston.
Last modified 3 November 2012.
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