Asteroids with Satellites Database--Johnston's Archive

2005 LW3

compiled by Wm. Robert Johnston
last updated 15 April 2023

--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, Apollo (PHA)

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.4386823182 AU
orbital period P: 1.725661307 yr
(= 630.2977923 d)
eccentricity e: 0.463841167
perihelion distance q: 0.771362233 AU
aphelion distance Q: 2.106002403 AU
inclination i: 6.020943°
argument of perihelion ω: 288.6627768°
ascending node Ω: 59.5875433°
mean anomaly M: 81.3845482°
perihelion passage TP: 2022 Oct 05.5097192
Epoch: 2023 Feb 25
data arc: 2005-2022 (78 obs.)
Earth MOID: 0.00139695 AU
Jupiter Tisserand invariant TJ: 4.543

orbital data, secondary:
semimajor axis as: 4 km (separation) [N22b]
separation/primary radius as/rp:20 [*D]
separation/Hill radius as/rH:0.16 [*D]
orbital period Ps: 9.5 d [*D]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 21.89 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.43 km [*D]
geometric albedo: 0.017 [*D]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 24 km [*E]

other data, primary:
diameter dp: 0.4 km [N22b]
rotation period RPp: 3.6 h [N22b]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 0.15 km [N22b]
dimensions :0.2 x 0.1 x ?km [N22b]
axial ratios a/b, b/c:2;? []
diameter ratio ds/dp: 0.38 [*D]
component mag. difference ΔM: 2.1 [*D]
rotation period RPs: ?

-- 2005 LW3 --discovery and notes:

Primary discovered 2005 Jun 05 from Siding Spring Observatory, New South Wales, Australia by Siding Spring Survey.

Companion discovered 2022 Nov 23 by S. P. Naidu, L. A. M. Benner, M. Brozovic, J. D. Giorgini, S. Horiuchi, I. Savill-Brown, J. Stevens, C. Phillips, P. Edwards, and E. Kruzins using radar observations from Goldstone Observatory, California, USA. Announced 2022 Nov [B22g].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2022, 2023 by Wm. Robert Johnston.
Last modified 15 April 2023.
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