Asteroids with Satellites Database--Johnston's Archive

(80218) 1999 VO123

compiled by Wm. Robert Johnston
last updated 7 September 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: main belt asteroid

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.218387762 AU
orbital period P: 3.304122886 yr
(= 1206.853677 d)
eccentricity e: 0.027163402
perihelion distance q: 2.1581288 AU
aphelion distance Q: 2.278646719 AU
inclination i: 1.7962305°
argument of perihelion ω: 188.25601°
ascending node Ω: 114.33295°
mean anomaly M: 310.64032°
perihelion passage TP: 2015 May 23.47196
Epoch: 2014 Dec 09
data arc: 1991-2015 (423 obs.)
Earth MOID: 1.1437 AU
Jupiter Tisserand invariant TJ: 3.65

orbital data, secondary:
semimajor axis as: 0.9 km [*D]
separation/primary radius as/rp:6.2 [P15f]
separation/Hill radius as/rH:0.019 [*E]
orbital period Ps: 1.38 d [P15f]
eccentricity es: 0 [P15f]
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 16.6 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 1.58 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: 50 km [*E]

other data, primary:
diameter dp: 0.28 km [P15f]
rotation period RPp: 2.9 ± 0.5 h [P15f]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 0.08 km [*E]
diameter ratio ds/dp: 0.3 [P15f]
component mag. difference ΔM: 2.6 [*D]
rotation period RPs: ?

-- (80218) 1999 VO123 --discovery and notes:

Primary discovered 1999 Nov 05 from Kitt Peak Observatory, Arizona, USA by Spacewatch Program. Alternate designation(s): 2002 SX27. Linked to prediscovery observations from 1991 Apr 07. Permanent number assigned 2004 May 04.

Companion discovered 2012 Oct 14 by Pravec, P., P. Scheirich, P. Kusnirak, K. Hornoch, and A. Galad using lightcurve observations. Announced 2015 Aug 05 [P15f].

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--Links to ADS abstracts:

© 2015 by Wm. Robert Johnston.
Last modified 7 September 2015.
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