(317) Roxane and S/2009 (317) 1

compiled by Wm. Robert Johnston
last updated 11 December 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: 2.2861683 AU
orbital period P: 3.46 y (=1,262.5853 d)
eccentricity e: 0.0852138
perihelion distance q: 2.0913552 AU
aphelion distance Q: 2.4809814 AU
inclination i: 1.76396°
argument of perihelion omega: 186.27713°
ascending node OMEGA: 151.43467°
mean anomaly M: 75.91905°
perihelion passage TP: 2009-04-12.7381
Epoch: 04 JAN 2010
data arc: 1891-2003 (647 obs.)

orbital data, secondary:
semimajor axis a: (245 km separation) [C2054]
semimajor axis/primary radius a/Rp: (25?)
orbital period P: (13 d?)
eccentricity e: ?

other data, primary:
diameter: 18.7 ± 1.4 km [IR]
absolute magnitude H: 10.03 [JPL]
rotation period: 8.169 h [JPL]
amplitude delta M: ?
color index U-B: 0.238 ± 0.004 [JPL]
color index B-V: 0.694 ± 0.007 [JPL]
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: 0.493 ± 0.083 [IR]
mass: ?
density: ?
type: E; Xe [JPL]

other data, secondary:
diameter: 5 km [C2054]
diameter ratio Ds/Dp: (0.25)
component magnitude difference: 2.7 [C2054]
rotation period: ?

--(317) Roxane and S/2009 (317) 1--discovery and notes:

Primary discovered 11 September 1891 by A. Charlois from Nice, France.

Secondary discovered 24 November 2009 by W. J. Merline, P. M. Tamblyn, J. D. Drummond, J. C. Christou, A. R. Conrad, B. Carry, C. R. Chapman, C. Dumas, D. D. Durda, W. M. Owen, and B. L. Enke, using the Gemini-North adaptive optics telescope; reported 26 November 2009.

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2009 by Wm. Robert Johnston.
Last modified 11 December 2009.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.