Asteroids with Satellites Database--Johnston's Archive

2000 WT169

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: 45.1211 AU
orbital period P: 303.094 yr
(= 110705.1 d)
eccentricity e: 0.00928
perihelion distance q: 44.702 AU
aphelion distance Q: 45.5397 AU
inclination i: 1.74288°
argument of perihelion ω: 257.26°
ascending node Ω: 110.519°
mean anomaly M: 75.52°
perihelion passage TP: 1950 Oct 22
Epoch: 2014 May 23
data arc: 2000-2010 (36 obs.)
Earth MOID: 43.7004 AU
Jupiter Tisserand invariant TJ: 6.002
Neptune Tisserand invariant TN:3.12 [*D]

orbital data, secondary:
semimajor axis as: 2600 ± 100 km (separation) [G12b]
separation/primary radius as/rp:25 [*E]
separation/Hill radius as/rH:0.0037 [*E]
orbital period Ps: 14 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.1 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 265 km [*E]
geometric albedo: (0.09 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1 g/cm3) [*A]
Hill radius rH: 710000 km [*E]

other data, primary:
diameter dp: 205 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 168 km [*E]
diameter ratio ds/dp: 0.82 [N09c]
component mag. difference ΔM: 0.43 [N09c]
rotation period RPs: ?

-- 2000 WT169 --discovery and notes:

Primary discovered 2000 Nov 23 from Mauna Kea Observatory, Hawaii, USA by D. C. Jewitt, S. S. Sheppard, and Y. R. Fernandez.

Companion discovered 2008 Sep 24 by K. S. Noll, W. M. Grundy, S. D. Benecchi, and H. A. Levison using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2009 Sep 27 [N09c].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2009, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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