Asteroids with Satellites Database--Johnston's Archive

(6186) Zenon and two satellites

compiled by Wm. Robert Johnston
last updated 15 September 2019

--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: main belt asteroid

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.3791444008 AU
orbital period P: 3.669705418 yr
(= 1340.3852189 d)
eccentricity e: 0.184198265
perihelion distance q: 1.94091013 AU
aphelion distance Q: 2.817378671 AU
inclination i: 4.2103976°
argument of perihelion ω: 86.43441°
ascending node Ω: 315.448074°
mean anomaly M: 29.554024°
perihelion passage TP: 2016 Oct 28.961729
Epoch: 2017 Feb 16
data arc: 1966-2016 (1253 obs.)
Earth MOID: 0.955066 AU
Jupiter Tisserand invariant TJ: 3.513

orbital data, secondary:
semimajor axis as: 9.1 km [*E]
separation/primary radius as/rp:3.1 [*E]
separation/Hill radius as/rH:0.010 [*E]
orbital period Ps: 0.5997 d [W17a]
eccentricity es: ?
normalized ang. mom. αL: ?

orbital data, secondary:
semimajor axis as: ?
separation/primary radius as/rp:?
separation/Hill radius as/rH:?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.7 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 6 km [*E]
geometric albedo:
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 880 km [*E]

other data, primary:
diameter dp: 5.8 km [*E]
rotation period RPp: 2.6832 h [W17a]
amplitude in mag., rotational ΔM: 0.08 [W17a]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 1.6 km [*E]
diameter ratio ds/dp: 0.28 [W17a]
component mag. difference ΔM: ?
rotation period RPs: 3.2987 h [W17a]

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

-- (6186) Zenon --discovery and notes:

Primary discovered 1988 Feb 11 from La Silla by E. W. Elst. Alternate designation(s): 1988 CC2, 1966 BT, 1979 SN6, 1990 SX15. Linked to prediscovery observations from 1966 Jan 21. Permanent number assigned 1994 Dec 18.

Named 1995 Mar 17 for Zenon of Elea (494 BC-430 BC) [MPC24919].

Two companions discovered 2017 Jan 01 by V. Benishek, P. Pravec, N. Gaftonyuk, M. Husarik, G. Cervak, and J. Oey using lightcurve observations from Sopot; Simeiz; Skalnate Pleso; Leura. Announced 2017 Jan 14 [B17a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2017, 2019 by Wm. Robert Johnston.
Last modified 15 September 2019.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.