Asteroids with Satellites Database--Johnston's Archive

(523756) 2014 WD509

compiled by Wm. Robert Johnston
last updated 9 October 2021

--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: 43.7994 AU
orbital period P: 289.875 yr
(= 105876.8 d)
eccentricity e: 0.047639
perihelion distance q: 41.71285 AU
aphelion distance Q: 45.886 AU
inclination i: 1.334372°
argument of perihelion ω: 254.484°
ascending node Ω: 201.5182°
mean anomaly M: 327.784°
perihelion passage TP: 2047 Jun 09.7
Epoch: 2021 Jul 01
data arc: 2010-2021 (156 obs.)
Earth MOID: 40.7301 AU
Jupiter Tisserand invariant TJ: 5.913
Neptune Tisserand invariant TN:3.09694015619662 [*D]

orbital data, secondary:
semimajor axis as: 7910 ± 50 km (separation) [G20a]
separation/primary radius as/rp:71 [*E]
separation/Hill radius as/rH:0.012 [*E]
orbital period Ps: 71 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 6.04 [MPC]
6.2 ± 0.5 [G20a]
slope parameter G: (0.15) [*A]
effective diameter dE: 273 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: 680000 km [*E]

other data, primary:
diameter dp: 222 km [*E]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 157 km [*E]
diameter ratio ds/dp: 0.71 [*D]
component mag. difference ΔM: 0.75 [G20a]
rotation period RPs: ?

-- (523756) 2014 WD509 --discovery and notes:

Primary discovered 2010 Oct 08 from Haleakala, Hawaii, USA by PanSTARRS 1 program. Permanent number assigned 2018 Sep 25.

Companion discovered 2020 Jul 18 by A. H. Parker, et al., and the Solar System Origins Legacy Survey using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2020 Jul [G20a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2020, 2021 by Wm. Robert Johnston.
Last modified 9 October 2021.
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