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
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