Asteroids with Satellites Database--Johnston's Archive

(24106) 1999 VA12

compiled by Wm. Robert Johnston
last updated 6 December 2020

--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: 2.3202275587 AU
orbital period P: 3.5342386445 yr
(= 1290.9050452 d)
eccentricity e: 0.215000264
perihelion distance q: 1.82137802 AU
aphelion distance Q: 2.819077096 AU
inclination i: 6.3625013°
argument of perihelion ω: 91.783199°
ascending node Ω: 261.406852°
mean anomaly M: 325.9509939°
perihelion passage TP: 2020 Sep 30.094538
Epoch: 2020 May 31
data arc: 1992-2020 (1261 obs.)
Earth MOID: 0.829871 AU
Jupiter Tisserand invariant TJ: 3.539

orbital data, secondary:
semimajor axis as: 7.2 km [*E]
separation/primary radius as/rp:4.2 [*E]
separation/Hill radius as/rH:0.015 [*E]
orbital period Ps: 0.9346 ± 0.0004 d [P20f]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.8 [MPC]
slope parameter G: 0.24 [P20f]
effective diameter dE: 3.6 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: 490 km [*E]

other data, primary:
diameter dp: 3.4 km [*E]
rotation period RPp: 4.1856 ± 0.0003 h [P20f]
amplitude in mag., rotational ΔM: 0.07 [P20f]
amplitude in mag., mutual events ΔM:0.12 [P20f]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >1.2 km [*E]
diameter ratio ds/dp: >0.34 [P20f]
component mag. difference ΔM: <2.34 [*D]
rotation period RPs: ?

-- (24106) 1999 VA12 --discovery and notes:

Primary discovered 1999 Nov 10 from Fountain Hills by C. W. Juels. Alternate designation(s): 1992 WW1. Linked to prediscovery observations from 1992 Nov 18. Permanent number assigned 2001 Apr 08.

Companion discovered 2020 Sep 24 by D. Pray, P. Pravec, H. Kucakova, P. Fatka, K. Hornoch, P. Kusnirak, V. Chiorny using lightcurve observations from Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA; Ondrejov Observatory; Kharkiv. Announced 2020 Oct 07 [P20f].

--Links, more technical:

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--Links to ADS abstracts:

© 2020 by Wm. Robert Johnston.
Last modified 6 December 2020
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