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Asteroids - Dynamic Site
AstDyS ∴ Objects ∴ Helena ∴ Orbital info ∴ Epoch epochXXX
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(101) Helena  ▹ 
ORBITAL INFORMATION
(ASCII data file 101.eq0)
Keplerian elements at epoch
54396.9 MJD
Value 1-σ variation Units
a 2.58224 7.509e-09 au
e 0.141838 4.68e-08
i 10.201 5.366e-06 deg
Ω 343.466 2.27e-05 deg
ω 347.812 2.623e-05 deg
M 196.102 1.405e-05 deg
Other useful info
Absolute Magnitude (H)    8.4 mag
Slope parameter (G)    0.35 mag
Perihelion 2.216 au
Aphelion 2.9485 au
Asc. node-Earth separation 1.21429 au
Desc. node-Earth separation 1.94746 au
Earth MOID 1.20651 au
Orbital period 1515.63 days
Date of orbit computation  Oct 31 04:54
Correlation matrix
1.00000000-0.221522660.00984862-0.015946550.06953903-0.12284037
-0.221522661.00000000-0.00466405-0.003283910.06011021-0.14054010
0.00984862-0.004664051.000000000.03432812-0.040431120.02261547
-0.01594655-0.003283910.034328121.00000000-0.83831108-0.03747636
0.069539030.06011021-0.04043112-0.838311081.00000000-0.49937997
-0.12284037-0.140540100.02261547-0.03747636-0.499379971.00000000
Covariance matrix
5.63826974E-17-7.78403870E-173.96806181E-16-2.71843087E-151.36960002E-14-1.29569327E-14
-7.78403870E-172.18991774E-15-1.17113456E-15-3.48886169E-157.37826761E-14-9.23851882E-14
3.96806181E-16-1.17113456E-152.87912227E-114.18175776E-12-5.69033719E-121.70460503E-12
-2.71843087E-15-3.48886169E-154.18175776E-125.15415502E-10-4.99201833E-10-1.19515537E-11
1.36960002E-147.37826761E-14-5.69033719E-12-4.99201833E-106.87993694E-10-1.83997333E-10
-1.29569327E-14-9.23851882E-141.70460503E-12-1.19515537E-11-1.83997333E-101.97322383E-10





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