Asteroids with Satellites Database--Johnston's Archive

2003 YS179

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: 43.863 AU
orbital period P: 290.506 yr
(= 106107.5 d)
eccentricity e: 0.02528
perihelion distance q: 42.754 AU
aphelion distance Q: 44.972 AU
inclination i: 3.72440°
argument of perihelion ω: 114.26°
ascending node Ω: 86.5251°
mean anomaly M: 285.90°
perihelion passage TP: 2074 Mar 10
Epoch: 2014 May 23
data arc: 2003-2013 (20 obs.)
Earth MOID: 41.7538 AU
Jupiter Tisserand invariant TJ: 5.911
Neptune Tisserand invariant TN:3.10 [*D]

orbital data, secondary:
semimajor axis as: 7830 ± 90 km (separation) [G12b]
separation/primary radius as/rp:120 [*E]
separation/Hill radius as/rH:0.018 [*E]
orbital period Ps: 150 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.8 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 167 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: 420000 km [*E]

other data, primary:
diameter dp: 126 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 110 km [*E]
diameter ratio ds/dp: 0.871 [G12b]
component mag. difference ΔM: 0.3 [G12b]
rotation period RPs: ?

-- 2003 YS179 --discovery and notes:

Primary discovered 2003 Dec 24 from Mauna Kea Observatory, Hawaii, USA by ?.

Companion discovered 2008 Nov 02 using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2011.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2011-2013, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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