AstDyS

AstDyS-2

Asteroids - Dynamic Site

AstDyS ∴ Objects ∴ 1999XH18 ∴ Orbital info ∴ Epoch epochXXX

(21987) 1999XH18 ▹

ORBITAL INFORMATION

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(ASCII data file 21987.eq0)

Keplerian elements at epoch
57661.0 MJD
	Value	1-σ variation	Units
a	2.57377	8.777e-09	au
e	0.244741	3.09e-08
i	6.983	4.125e-06	deg
Ω	203.912	3.496e-05	deg
ω	143.941	3.707e-05	deg
M	54.469	1.198e-05	deg

Other useful info
Absolute Magnitude (H)	14.8	mag
Slope parameter (G)	0.15	mag
Perihelion	1.9439	au
Aphelion	3.2037	au
Asc. node-Earth separation	2.01171	au
Desc. node-Earth separation	1.02339	au
Earth MOID	0.94231	au
Orbital period	1508.18	days
Date of orbit computation	Jun 5 00:41

Correlation matrix
1.00000000	0.29085544	0.00442408	-0.00727904	0.17641409	-0.53805228
0.29085544	1.00000000	-0.00322041	-0.00340166	0.07744803	-0.23818119
0.00442408	-0.00322041	1.00000000	0.32567426	-0.30818423	0.00764868
-0.00727904	-0.00340166	0.32567426	1.00000000	-0.94066668	0.01214105
0.17641409	0.07744803	-0.30818423	-0.94066668	1.00000000	-0.34088298
-0.53805228	-0.23818119	0.00764868	0.01214105	-0.34088298	1.00000000

Covariance matrix
7.70305471E-17	7.88887823E-17	1.60179231E-16	-2.23349537E-15	5.73932988E-14	-5.65677380E-14
7.88887823E-17	9.55021510E-16	-4.10553448E-16	-3.67516386E-15	8.87183303E-14	-8.81712286E-14
1.60179231E-16	-4.10553448E-16	1.70177756E-11	4.69693139E-11	-4.71257448E-11	3.77964379E-13
-2.23349537E-15	-3.67516386E-15	4.69693139E-11	1.22224639E-09	-1.21902205E-09	5.08450431E-12
5.73932988E-14	8.87183303E-14	-4.71257448E-11	-1.21902205E-09	1.37401933E-09	-1.51361208E-10
-5.65677380E-14	-8.81712286E-14	3.77964379E-13	5.08450431E-12	-1.51361208E-10	1.43491341E-10