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AstDyS ∴ Objects ∴ 1981ER18 ∴ Summary
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(99980) 1981ER18  ▹ 
SUMMARY
Keplerian elements at epoch
60400.0 MJD
Value 1-σ variation Units
a 2.55745 1.024e-08 au
e 0.168078 2.862e-08
i 5.058 5.382e-06 deg
Ω 344.627 5.577e-05 deg
ω 130.353 5.976e-05 deg
M 228.817 2.1e-05 deg

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Other useful info
Absolute Magnitude (H)    15.4 mag
Slope parameter (G)    0.15 mag
Perihelion 2.1276 au
Aphelion 2.9873 au
Asc. node-Earth separation 1.78141 au
Desc. node-Earth separation 1.24967 au
Earth MOID 1.14843 au
Orbital period 1493.85 days
Date of orbit computation  feb 22 02:11
Observational summary
Optical observations (Discarded) 1187 (6)
Radar observations (Discarded) 0 (0)
Arc length 15105.5 days
Unobserved 678 days

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Ephemeris at epoch 60423 MJD
Right Ascension 350.697 deg
Declination -4.71797 deg
V Magnitude 21.16 mag
Solar Elongation 43.41 deg
Galactic Latitude -59.2 deg
Rate 0.362 deg/day
Direction 65.005 deg

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