Asteroids with Satellites Database--Johnston's Archive

(1509) Esclangona and S/2003 (1509) 1

compiled by Wm. Robert Johnston
last updated 9 October 2021

--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, Hungaria

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.8660946059 AU
orbital period P: 2.54922805 yr
(= 931.1055453 d)
eccentricity e: 0.032131239
perihelion distance q: 1.806134673 AU
aphelion distance Q: 1.9260545383 AU
inclination i: 22.32426114°
argument of perihelion ω: 267.545077°
ascending node Ω: 283.5121643°
mean anomaly M: 45.040289°
perihelion passage TP: 2021 Mar 06.507603
Epoch: 2021 Jul 01
data arc: 1938-2021 (2472 obs.)
Earth MOID: 0.844747 AU
Jupiter Tisserand invariant TJ: 3.896

orbital data, secondary:
binary dynamical type:W [P07f]
semimajor axis as: 140 km (separation) [M03a]
separation/primary radius as/rp:36.1 [*E]
separation/Hill radius as/rH:0.13 [*E]
orbital period Ps: 23 d [*E]
eccentricity es: ?
normalized ang. mom. αL: 1.47 [M09a]

other data, system (combined):
absolute mag. H: 12.59 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 8.17 ± 0.6 km [T04c]
geometric albedo: 0.233 ± 0.038 [T04c]
color index U-B: 0.472 [T95a]
color index B-V: 0.894 [T95a]
taxonomic type: S (Tholen) [JPL]
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1100 km [*E]

other data, primary:
diameter dp: 7.76 ± 0.57 km [*D]
rotation period RPp: 3.253 ± 0 h [W10c]
amplitude in mag., rotational ΔM: 0.12 [H03a]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 2.57 km [*D]
axial ratios a/b, b/c:1.29;? [P16d]
diameter ratio ds/dp: 0.331 [M03a]
component mag. difference ΔM: 2.40 [*D]
rotation period RPs: 6.6422 ± 0.0004 h [P16d]

-- (1509) Esclangona and S/2003 (1509) 1 --discovery and notes:

Primary discovered 1938 Dec 21 from Nice, France by A. Patry. Alternate designation(s): 1938 YG . Permanent number assigned 1940 Oct 30.

Named - for Ernest Esclangon (1876-1954) [-].

Companion discovered 2003 Feb 13 by W. J. Merline, L. M. Close, P. M. Tamblyn, F. Menard, C. R. Chapman, C. Dumas, G. Duvert, W. M. Owen, D. C. Slater, and M. F. Sterzik using adaptive optics telescope observations from Very Large Telescope, European Southern Observatory, Cerro Paranal, Chile. Announced 2003 Feb 18 [M03a]. Provisional designation S/2003 (1509) 1.

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© 2003-2014, 2021 by Wm. Robert Johnston.
Last modified 9 October 2021.
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