Asteroids with Satellites Database--Johnston's Archive

2007 LE

compiled by Wm. Robert Johnston
last updated 20 September 2014

--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: 1.838829142 AU
orbital period P: 2.493562563 yr
(= 910.7737262 d)
eccentricity e: 0.516738856
perihelion distance q: 0.888634674 AU
aphelion distance Q: 2.789023610 AU
inclination i: 29.520961°
argument of perihelion ω: 120.115003°
ascending node Ω: 73.7623125°
mean anomaly M: 301.9938604°
perihelion passage TP: 2014 Oct 16.751299
Epoch: 2014 May 23
data arc: 2001-2012 (361 obs.)
Earth MOID: 0.0454952 AU
Jupiter Tisserand invariant TJ: 3.715


orbital data, secondary:
semimajor axis as: 1.4 km [*E]
separation/primary radius as/rp:5.6 [*E]
separation/Hill radius as/rH:0.040 [*E]
orbital period Ps: 1.396 ± 0.02 d [H12a]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 19.7 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.53 km [*D]
geometric albedo: 0.08 [*E]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 35 km [*E]

other data, primary:
diameter dp: 0.5 km [B12a]
rotation period RPp: 2.603 ± 0.005 h [H12a]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 0.18 km [B12a]
diameter ratio ds/dp: 0.36 [*D]
component mag. difference ΔM: 2.2 [* D]
rotation period RPs: ?

-- 2007 LE --discovery and notes:

Primary discovered 2007 Jun 07 from Lincoln Laboratory ETS, New Mexico, USA by LINEAR. Linked to prediscovery observations from 2001 Dec 20.

Companion discovered 2012 May 31 by M. Brozovic, L. A. M. Benner, P. A. Taylor, E. S. Howell, M. C. Nolan, J. L. Margot, J. D. Giorgini, M. W. Busch, S. P. Naidu, C. Nugent, C. Magri, and M. K. Shepard using radar observations from Goldstone, California, USA; Arecibo Observatory, Puerto Rico. Announced 2012 Jun [B12a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2012, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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