Asteroids with Satellites Database--Johnston's Archive

(190166) 2005 UP156

compiled by Wm. Robert Johnston
last updated 14 June 2017

--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, Amor


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.115549502 AU
orbital period P: 3.07705166 yr
(= 1123.914346 d)
eccentricity e: 0.469603066
perihelion distance q: 1.12208097 AU
aphelion distance Q: 3.109018033 AU
inclination i: 4.2083056°
argument of perihelion ω: 91.155853°
ascending node Ω: 193.406532°
mean anomaly M: 18.5392629°
perihelion passage TP: 2017 Jul 08.120712
Epoch: 2017 Sep 04
data arc: 2002-2017 (803 obs.)
Earth MOID: 0.131551 AU
Jupiter Tisserand invariant TJ: 3.582


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

other data, system (combined):
absolute mag. H: 17.1 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 1.05 ± 0.03 km [M**]
geometric albedo: 0.234 ± 0.033 [M**]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: g/cm3[]
Hill radius rH: km []

other data, primary:
diameter dp: km []
rotation period RPp: 40.5 h [JPL]
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: ?

-- (190166) 2005 UP156 --discovery and notes:

Primary discovered 2005 Oct 31 from Kitt Peak Observatory, Arizona, USA by Spacewatch. Linked to prediscovery observations from 2002 Nov 24. Permanent number assigned 2008 Aug 19.

Companion discovered 2017 May by B. D. Warner and A. W. Harris using lightcurve observations. Confirmed by radar observations. Announced 2017 May 24.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2017 by Wm. Robert Johnston.
Last modified 14 June 2017.
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