2003 UB313 and S/2005 (2003 UB313) 1

compiled by Wm. Robert Johnston
last updated 10 October 2005

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: 67.6619516157667 AU
orbital period P: 556.5767 y (=203,292 d)
eccentricity e: 0.442156219250816
perihelion distance q: 37.74479890227076 AU
aphelion distance Q: 97.57910433 AU
inclination i: 44.1774440902399°
argument of perihelion omega: 151.333690213266°
ascending node OMEGA: 35.8747379052262°
mean anomaly M: 197.506001085271°
perihelion passage TP: 2256-11-09.287597
Epoch: 18 AUG 2005
data arc: 1954-2005 (134 obs.)

orbital data, secondary:
semimajor axis a: 36,000 km? [B05b]
semimajor axis/primary radius a/Rp: (26?)
orbital period P: ~14 d [B05b]
eccentricity e: ?
inclination i: ?

other data, primary:
diameter: (2,800 km?)
absolute magnitude H: -1.14 [JPL]
rotation period: ?
amplitude delta M: ?
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) [a]
geometric albedo: ?
mass: ?
density: ?
type: ?

other data, secondary:
diameter: (350 km?)
diameter ratio Ds/Dp: (0.13)
component magnitude difference: 4.43 ± 0.05 [I8600]
rotation period: ?

--2003 UB313--discovery and notes:

Companion discovered by M. E. Brown et al. by observations from the Keck II adaptive optics telescope made 10 September 2005; announced 1 October 2005. 2003 UB313 has been nicknamed "Xena" by the discovery team, which has also nicknamed the satellite "Gabrielle".

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2005 by Wm. Robert Johnston.
Last modified 10 October 2005.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.