Asteroids with Satellites Database--Johnston's Archive

2000 UG11

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: NEA, Apollo (PHA)


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.928364818 AU
orbital period P: 2.677885485 yr
(= 978.0976735 d)
eccentricity e: 0.572821161
perihelion distance q: 0.823756645 AU
aphelion distance Q: 3.032972991 AU
inclination i: 8.9237234°
argument of perihelion ω: 240.543154°
ascending node Ω: 224.2172603°
mean anomaly M: 4.222776°
perihelion passage TP: 2014 May 11.52697
Epoch: 2014 May 23
data arc: 2000-2009 (421 obs.)
Earth MOID: 0.00734736 AU
Jupiter Tisserand invariant TJ: 3.684


orbital data, secondary:
binary dynamical type:A [P07f]
semimajor axis as: 0.426 ± 0.027 km [M02b]
separation/primary radius as/rp:3.3 [*D]
separation/Hill radius as/rH:0.030 [*D]
orbital period Ps: 0.7667 ± 0.006 d [P06b]
eccentricity es: 0.12 ± 0.02 [M02b]
normalized ang. mom. αL: 1.16 [P07f]

other data, system (combined):
absolute mag. H: 20.4 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.29 km [*D]
geometric albedo: 0.09 ± 0.03 [P06b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: 9.4x109 ± 1.6x109 kg [M02b]
density ρ: 1.47 ± 0.7 g/cm3[M02b]
Hill radius rH: 14 km [*D]

other data, primary:
diameter dp: 0.26 ± 0.03 km [P06b]
rotation period RPp: 4.44 ± 0.01 h [P06b]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 0.13 ± 0.03 km [*D]
diameter ratio ds/dp: 0.5 ± 0.09 [P06b]
component mag. difference ΔM: 1.5 ± 0.4 [*D]
rotation period RPs: ?

-- 2000 UG11 --discovery and notes:

Primary discovered 2000 Oct 25 from Lincoln Laboratory ETS, New Mexico, USA by LINEAR.

Companion discovered 2000 Nov 03 using radar observations. Announced 2000 Nov 10.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2001-2005, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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