Asteroids with Satellites Database--Johnston's Archive

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

compiled by Wm. Robert Johnston
last updated 21 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: main belt asteroid, Hungaria


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.866345859 AU
orbital period P: 2.549742914 yr
(= 931.2935992 d)
eccentricity e: 0.032215871
perihelion distance q: 1.80621990 AU
aphelion distance Q: 1.926471816 AU
inclination i: 22.3239239°
argument of perihelion ω: 268.04538°
ascending node Ω: 283.545806°
mean anomaly M: 120.92574°
perihelion passage TP: 2013 Jul 14.1739
Epoch: 2014 May 23
data arc: 1938-2013 (754 obs.)
Earth MOID: 0.844185 AU
Jupiter Tisserand invariant TJ: 3.895


orbital data, secondary:
binary dynamical type:W [P07f]
semimajor axis as: 140 km (separation) [M03a]
separation/primary radius as/rp:36 [*E]
separation/Hill radius as/rH:0.127 [*E]
orbital period Ps: 23 d [*E]
eccentricity es: ?
normalized ang. mom. αL: 1.47 [M09a]

other data, system (combined):
absolute mag. H: 12.64 [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 ± 0.000 h [W10c]
amplitude in mag., rotational ΔM: 0.12 [H03a]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 2.57 km [*D]
diameter ratio ds/dp: 0.331 [M03a]
component mag. difference ΔM: 2.4 [*D]
rotation period RPs: ?

-- (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 -.

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, M. F. Sterzik using adaptive optics telescope observations from Very Large Telescope, ESO, Cerro Paranal, Chile. Announced 2003 Feb 18 [M03a]. Provisional designation S/2003 (1509) 1.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2003-2005, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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