Asteroids with Satellites Database--Johnston's Archive

(2242) Balaton

compiled by Wm. Robert Johnston
last updated 23 January 2016

--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: 2.2079974764 AU
orbital period P: 3.280936757 yr
(= 1198.3847834 d)
eccentricity e: 0.117437977
perihelion distance q: 1.94869472 AU
aphelion distance Q: 2.467300233 AU
inclination i: 2.5377704°
argument of perihelion ω: 96.01215°
ascending node Ω: 343.89881°
mean anomaly M: 13.592257°
perihelion passage TP: 2015 Nov 28.753461
Epoch: 2016 Jan 13
data arc: 1936-2015 (1246 obs.)
Earth MOID: 0.965658 AU
Jupiter Tisserand invariant TJ: 3.649


orbital data, secondary:
semimajor axis as: 9 km [*E]
separation/primary radius as/rp:3.0 [*E]
separation/Hill radius as/rH:0.010 [*E]
orbital period Ps: 0.54 ± 0.0004 d [M16a]
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: 6.13 ± 0.11 km [M11b]
geometric albedo: 0.142 ± 0.017 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 910 km [*E]

other data, primary:
diameter dp: 5.95 km [*D]
rotation period RPp: 2.79792 ± 0.00009 h [M16a]
amplitude in mag., rotational ΔM: 0.18 [M16a]
amplitude in mag., mutual events ΔM:0.055 ±0.025 [M16a]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: >1.49 km [*D]
diameter ratio ds/dp: >0.25 [M16a]
component mag. difference ΔM: <3.0 [*D]
rotation period RPs: ?

-- (2242) Balaton --discovery and notes:

Primary discovered 1936 Oct 13 from Konkoly, Budapest, Hungary by G. Kulin. Alternate designation(s): 1936 TG, 1941 FQ, 1972 RE2, 1972 TT8, 1975 RZ, A918 FB. Permanent number assigned 1980 May 01.

Named 1993 Mar 06 for the lake in Hungary [MPC21605].

Companion discovered 2015 Dec 27 by A. Marchini, F. Salvaggio, R. Papini, P. Pravec, D. Klinglesmith, D. Pray, P. Bacci, L. Franco, and A. Carbognani using lightcurve observations from Astronomical Observatory of the University of Siena; Etscorn Campus Observatory, Socorro, New Mexico, USA; Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA; San Marcello Pistoiese Observatory, Italy. Announced 2016 Jan 23.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2016 by Wm. Robert Johnston.
Last modified 23 January 2016
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.