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Asteroids - Dynamic Site
AstDyS ∴ Objects ∴ Helena ∴ Summary
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(101) Helena  ▹ 
SUMMARY
Keplerian elements at epoch
58400.0 MJD
Value 1-σ variation Units
a 2.5839 7.463e-09 au
e 0.140134 4.674e-08
i 10.194 5.366e-06 deg
Ω 343.398 2.271e-05 deg
ω 348.358 2.634e-05 deg
M 65.82 1.541e-05 deg

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Other useful info
Absolute Magnitude (H)    8.4 mag
Slope parameter (G)    0.35 mag
Perihelion 2.2218 au
Aphelion 2.946 au
Asc. node-Earth separation 1.21926 au
Desc. node-Earth separation 1.94293 au
Earth MOID 1.21187 au
Orbital period 1517.09 days
Date of orbit computation  Oct 31 04:54
Observational summary
Optical observations (Discarded) 1703 (88)
Radar observations (Discarded) 0 (0)
Arc length 53904.6 days
Unobserved 29 days

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Ephemeris at epoch 58443 MJD
Right Ascension 61.9518 deg
Declination 37.4739 deg
V Magnitude 11.86 mag
Solar Elongation 161.6 deg
Galactic Latitude -10.67 deg
Rate 0.239 deg/day
Direction -95.495 deg

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