(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: 
20090708.46568

Epoch: 
18 JUN 2009

data arc: 
19882009 (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 BV: 
?

color index VR: 
?

color index RI: 
?

slope parameter G: 
(0.15) assumed

geometric albedo: 
0.42 ± 0.10 [B11a]

mass: 
(25.935 ± 1.315)x10^{10} kg [F11a]

density: 
2.1 ± 0.6 g/cm^{3} [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)x10^{10} 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)x10^{10} kg [F11a]


(136617) 1994 CCdiscovery 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 nearEarth 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 EarthMoon 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:
 Scotti, J., Jedicke, R., & Marsden, B. G. 1996, Minor Planet Electronic Circulars 1994 CC
 Gehrels, T., Scotti, J. V., & Marsden, B. G. 1994, Minor Planet Electronic Circulars 1994 CC
 Scotti, J. V., Gehrels, T., & Marsden, B. G. 1994, Minor Planet Electronic Circulars 1994 CC
© 2009, 2012 by Wm. Robert Johnston.
Last modified 3 November 2012.
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