Asteroids with Satellites Database--Johnston's Archive

(518678) 2008 UZ94

compiled by Wm. Robert Johnston
last updated 17 Dec 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: NEA, Apollo (PHA)


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.1916334212 AU
orbital period P: 3.244591859 yr
(= 1185.0871764 d)
eccentricity e: 0.572233845
perihelion distance q: 0.937506602 AU
aphelion distance Q: 3.4457602404 AU
inclination i: 30.238719°
argument of perihelion ω: 159.663004°
ascending node Ω: 248.241566°
mean anomaly M: 19.2647793°
perihelion passage TP: 2021 Nov 18.582103
Epoch: 2022 Jan 21
data arc: 2008-2021 (342 obs.)
Earth MOID: 0.0255465 AU
Jupiter Tisserand invariant TJ: 3.294


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 17.39 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.96 ± 0.3 km [*21a]
geometric albedo: 0.21 [*D]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1 g/cm3) [*A]
Hill radius rH: 140 km [*E]

other data, primary:
diameter dp: 0.96 ± 0.3 km [B21m]
rotation period RPp: 4.8 h [B21m]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: ?
component mag. difference ΔM: ?
rotation period RPs: ?

-- (518678) 2008 UZ94 --discovery and notes:

Primary discovered 2008 Oct 28 from Socorro, New Mexico, USA by LINEAR Program. Permanent number assigned 2018 May 29.

Companion discovered 2021 Dec using radar observations from Goldstone Observatory, California, USA. [B21m] Announced 2021 Dec.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2021 by Wm. Robert Johnston.
Last modified 17 Dec 2021.
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