Asteroids with Satellites Database--Johnston's Archive

(4296) Van Woerkom

compiled by Wm. Robert Johnston
last updated 19 February 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: main belt asteroid


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.2487558164 AU
orbital period P: 3.372200974 yr
(= 1231.7196683 d)
eccentricity e: 0.165864138
perihelion distance q: 1.87576787 AU
aphelion distance Q: 2.6217437606 AU
inclination i: 6.1478296°
argument of perihelion ω: 26.671687°
ascending node Ω: 13.107595°
mean anomaly M: 27.589428°
perihelion passage TP: 2016 Nov 13.604331
Epoch: 2017 Feb 16
data arc: 1935-2017 (1474 obs.)
Earth MOID: 0.885707 AU
Jupiter Tisserand invariant TJ: 3.603


orbital data, secondary:
semimajor axis as: 17 km [*E]
separation/primary radius as/rp:4.7 [*E]
separation/Hill radius as/rH:0.016 [*D]
orbital period Ps: 1.093 d [W17a]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.2 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 7.6 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: 1100 km [*E]

other data, primary:
diameter dp: 7.3 km [*E]
rotation period RPp: 2.809 ± 0.002 h [O17a]
amplitude in mag., rotational ΔM: 0.2 [O17a]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 2.2 km [*E]
diameter ratio ds/dp: 0.3 [O17a]
component mag. difference ΔM: 2.6 [*D]
rotation period RPs: ?

-- (4296) Van Woerkom --discovery and notes:

Primary discovered 1935 Sep 28 from Johannesburg, South Africa by H. van Gent. Alternate designation(s): 1935 SA2, 1972 TE5, 1979 WB3. Permanent number assigned 1990 Jan 11.

Named 1991 Apr 28 for A. J. J. van Woerkom [MPC18140].

Companion discovered 2016 Nov 29 by P. Pravec, C. Odden, et al. using lightcurve observations. Announced 2017 Jan 08 [P17b].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2017 by Wm. Robert Johnston.
Last modified 19 February 2017.
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