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(21987) 1999XH18  ▹ 
SUMMARY
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

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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  feb 22 01:54
Observational summary
Optical observations (Discarded) 1490 (6)
Radar observations (Discarded) 0 (0)
Arc length 15466.1 days
Unobserved 281 days

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Ephemeris at epoch 60419 MJD
Right Ascension 351.919 deg
Declination 0.69727 deg
V Magnitude 19.28 mag
Solar Elongation 36.42 deg
Galactic Latitude -55.65 deg
Rate 0.581 deg/day
Direction 68.289 deg

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