Asteroids with Satellites Database--Johnston's Archive

2003 WU188

compiled by Wm. Robert Johnston
last updated 20 September 2014

--Orbital and physical data--

(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary: TNO, Cubewano

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 44.410 AU
orbital period P: 295.959 yr
(= 108099.1 d)
eccentricity e: 0.04184
perihelion distance q: 42.552 AU
aphelion distance Q: 46.268 AU
inclination i: 3.76954°
argument of perihelion ω: 321.63°
ascending node Ω: 84.0325°
mean anomaly M: 55.32°
perihelion passage TP: 1968 Nov 27
Epoch: 2014 May 23
data arc: 2003-2011 (21 obs.)
Earth MOID: 41.5613 AU
Jupiter Tisserand invariant TJ: 5.942
Neptune Tisserand invariant TN:3.10 [*D]

orbital data, secondary:
semimajor axis as: 1300 ± 100 km (separation) [N08c]
separation/primary radius as/rp:15 [*E]
separation/Hill radius as/rH:0.0023 [*E]
orbital period Ps: 6.5 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 5.7 [MPC]
5.96 ± 0.64 [V14a]
slope parameter G: (0.15) [*A]
effective diameter dE: <220 km [V14a]
geometric albedo: >0.15 [V14a]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1 g/cm3) [*A]
Hill radius rH: 560000 km [*E]

other data, primary:
diameter dp: 178 km [V14a]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 129 km [V14a]
diameter ratio ds/dp: 0.724 ± 0.1 [N08c]
component mag. difference ΔM: 0.7 ± 0.3 [N08c]
rotation period RPs: ?

-- 2003 WU188 --discovery and notes:

Primary discovered 2003 Nov 24 from Kitt Peak Observatory, Arizona, USA by M. W. Buie.

Companion discovered - using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2007 Mar 14.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2007-2008, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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