Asteroids with Satellites Database--Johnston's Archive

2014 WZ120

compiled by Wm. Robert Johnston
last updated 24 March 2015

--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: NEA, Apollo (PHA)


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.2136843 AU
orbital period P: 3.2936203 yr
(= 1203.0175 d)
eccentricity e: 0.63862784
perihelion distance q: 0.79996387 AU
aphelion distance Q: 3.6274047 AU
inclination i: 20.926891°
argument of perihelion ω: 245.143724°
ascending node Ω: 244.924489°
mean anomaly M: 349.566456°
perihelion passage TP: 2015 Jan 12.865932
Epoch: 2014 Dec 09
data arc: 2014 Nov-2014 Dec (329 obs.)
Earth MOID: 0.0292124 AU
Jupiter Tisserand invariant TJ: 3.288


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: 0.56938 ± 0.00025 d [W15e]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 20.4 [MPC]
20.44 ± 0.36 [JPL]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.36 km [*E]
geometric albedo: (0.16 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: ? km [*E]

other data, primary:
diameter dp: 0.34 km [*E]
rotation period RPp: 3.361 ± 0.002 h [W15e]
amplitude in mag., rotational ΔM: 0.05 [W15e]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 0.11 km [*E]
diameter ratio ds/dp: >0.32 ± 0.02 [W15e]
component mag. difference ΔM: 2.5 [*D]
rotation period RPs: ?

-- 2014 WZ120 --discovery and notes:

Primary discovered 2014 Nov 21 from Catalina Station, Arizona, USA by Catalina Sky Survey.

Companion discovered 2014 Nov using radar observations from Arecibo Observatory, Puerto Rico. Announced 2014 Nov.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2014, 2015 by Wm. Robert Johnston.
Last modified 24 March 2015.
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