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AstDyS ∴ Objects ∴ 1999AR21 ∴ Summary
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(31413) 1999AR21  ▹ 
SUMMARY
Keplerian elements at epoch
60400.0 MJD
Value 1-σ variation Units
a 2.30146 6.7e-09 au
e 0.079028 3.422e-08
i 1.822 3.671e-06 deg
Ω 301.08 9.844e-05 deg
ω 230.162 0.0001009 deg
M 45.675 2.149e-05 deg

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Other useful info
Absolute Magnitude (H)    15.6 mag
Slope parameter (G)    0.15 mag
Perihelion 2.1196 au
Aphelion 2.4833 au
Asc. node-Earth separation 1.39365 au
Desc. node-Earth separation 1.19305 au
Earth MOID 1.12591 au
Orbital period 1275.27 days
Date of orbit computation  feb 22 01:56
Observational summary
Optical observations (Discarded) 1874 (8)
Radar observations (Discarded) 0 (0)
Arc length 9255.17 days
Unobserved 415 days

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Ephemeris at epoch 60398 MJD
Right Ascension 243.567 deg
Declination -23.8927 deg
V Magnitude 19.18 mag
Solar Elongation 122.46 deg
Galactic Latitude 19.31 deg
Rate 0.068 deg/day
Direction 112.559 deg

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