Asteroids with Satellites Database--Johnston's Archive


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

orbital data, primary (osculating elements) [F10b] :
semimajor axis a: 42.9 AU
orbital period P: 280 yr
(= 102000 d)
eccentricity e: ?
perihelion distance q: ? AU
aphelion distance Q: ? AU
inclination i: 3.5°
argument of perihelion ω:
ascending node Ω:
mean anomaly M:
perihelion passage TP: ?
Epoch: N/A
data arc: 2005 Aug 3 (3 obs.)
Earth MOID: ? AU
Jupiter Tisserand invariant TJ: ?

orbital data, secondary:
semimajor axis as: 16400 ± 1600 km (separation) [F10b]
separation/primary radius as/rp:240 [*E]
separation/Hill radius as/rH:0.034 [*E]
orbital period Ps: 1000 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 0 [MPC]
6.8 ± 0.3 [F10b]
slope parameter G: (0.15) [*A]
effective diameter dE: 190 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: 500000 km [*E]

other data, primary:
diameter dp: 135 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 135 km [*E]
diameter ratio ds/dp: 1.0 [*D]
component mag. difference ΔM: 0.1 [F10b]
rotation period RPs: ?

-- [hst5] --discovery and notes:

Primary discovered 2005 Aug 03 from Hubble Space Telescope by C. I. Fuentes, M. J. Holman, D. E. Trilling, and P. Protopapas.

Companion discovered 2005 Aug 03 by C. I. Fuentes, M. J. Holman, D. E. Trilling, and P. Protopapas using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2010 Oct 01 [F10b].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2010, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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