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AstDyS ∴ Objects ∴ 1999US21 ∴ Summary
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(102554) 1999US21  ▹ 
SUMMARY
Keplerian elements at epoch
60400.0 MJD
Value 1-σ variation Units
a 2.44306 1.077e-08 au
e 0.115142 5.932e-08
i 6.84 5.048e-06 deg
Ω 35.562 4.286e-05 deg
ω 139.034 4.723e-05 deg
M 9.018 2.09e-05 deg

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Other useful info
Absolute Magnitude (H)    16.8 mag
Slope parameter (G)    0.15 mag
Perihelion 2.1618 au
Aphelion 2.7244 au
Asc. node-Earth separation 1.64772 au
Desc. node-Earth separation 1.21153 au
Earth MOID 1.17102 au
Orbital period 1394.76 days
Date of orbit computation  apr 23 20:09
Observational summary
Optical observations (Discarded) 478 (2)
Radar observations (Discarded) 0 (0)
Arc length 10378.2 days
Unobserved 37 days

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Ephemeris at epoch 60427 MJD
Right Ascension 179.814 deg
Declination 4.4993 deg
V Magnitude 19.95 mag
Solar Elongation -140.97 deg
Galactic Latitude 64.17 deg
Rate 0.11 deg/day
Direction -115.087 deg

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