AstDyS-2
Asteroids - Dynamic Site
AstDyS ∴ Objects ∴ 1999XH18 ∴ Orbital info ∴ Epoch epochXXX
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(21987) 1999XH18  ▹ 
ORBITAL INFORMATION
◲
(ASCII data file 21987.eq1)
Keplerian elements at epoch
60400.0 MJD
Value 1-σ variation Units
a 2.57447 8.935e-09 au
e 0.243117 3.089e-08
i 6.979 4.122e-06 deg
Ω 203.839 3.499e-05 deg
ω 144.046 3.712e-05 deg
M 347.784 1.422e-05 deg
Other useful info
Absolute Magnitude (H)    14.8 mag
Slope parameter (G)    0.15 mag
Perihelion 1.9486 au
Aphelion 3.2004 au
Asc. node-Earth separation 2.01274 au
Desc. node-Earth separation 1.0282 au
Earth MOID 0.94751 au
Orbital period 1508.79 days
Date of orbit computation  Jun 5 00:41
Correlation matrix
1.000000000.304511830.00495818-0.007150430.18036369-0.70299497
0.304511831.00000000-0.00256172-0.003981900.07417722-0.26328016
0.00495818-0.002561721.000000000.32602599-0.308437250.00585825
-0.00715043-0.003981900.326025991.00000000-0.940296200.01216126
0.180363690.07417722-0.30843725-0.940296201.00000000-0.33380859
-0.70299497-0.263280160.005858250.01216126-0.333808591.00000000
Covariance matrix
7.98302214E-178.40523336E-171.82615560E-16-2.23561341E-155.98232789E-14-8.93121368E-14
8.40523336E-179.54385618E-16-3.26231095E-16-4.30460345E-158.50687220E-14-1.15652407E-13
1.82615560E-16-3.26231095E-161.69927739E-114.70289179E-11-4.71993915E-113.43379591E-13
-2.23561341E-15-4.30460345E-154.70289179E-111.22450690E-09-1.22146979E-096.05109318E-12
5.98232789E-148.50687220E-14-4.71993915E-11-1.22146979E-091.37808137E-09-1.76201472E-10
-8.93121368E-14-1.15652407E-133.43379591E-136.05109318E-12-1.76201472E-102.02185122E-10