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AstDyS ∴ Objects ∴ 1999XH18 ∴ Proper elements
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(21987) 1999XH18  ▹ 
PROPER ELEMENTS
Proper elements
Analytic
Value Units
a 2.57376 au
e 0.2035
sin(i) 0.1297
g 51.261 sec/yr
s -55.857 sec/yr
RFL 13
QCM 0
Synthetic
Value RMS Units
a 2.5737 1.90E-7 au
e 0.208393 3.43E-4
sin(i) 0.129693 3.22E-5
n 87.173 5.00E-6 deg/yr
g 49.7939 1.46E-2 sec/yr
s -56.7095 5.18E-2 sec/yr
Chaos
Value Units
LCE 1.5 1/Myr
ITS -2 Myr
Family
Value
Status Background asteroid