AstDyS-2

Asteroids - Dynamic Site
AstDyS ∴ Objects ∴ Sirene ∴ Summary
Contact »
(1009) Sirene  ▹ 
SUMMARY
Keplerian elements at epoch
58400.0 MJD
Value 1-σ variation Units
a 2.62374 4.062e-09 au
e 0.456153 6.864e-08
i 15.775 8.734e-06 deg
Ω 229.457 2.676e-05 deg
ω 186.387 2.802e-05 deg
M 104.286 1.019e-05 deg

More info »
Other useful info
Absolute Magnitude (H)    13.9 mag
Slope parameter (G)    0.15 mag
Perihelion 1.4269 au
Aphelion 3.8206 au
Asc. node-Earth separation 2.78942 au
Desc. node-Earth separation 0.4396 au
Earth MOID 0.43853 au
Orbital period 1552.32 days
Date of orbit computation  Oct 31 04:55
Observational summary
Optical observations (Discarded) 851 (16)
Radar observations (Discarded) 0 (0)
Arc length 34551.3 days
Unobserved 224 days

More info »
Ephemeris at epoch 58500 MJD
Right Ascension 224.528 deg
Declination -21.262 deg
V Magnitude 20.41 mag
Solar Elongation 68.14 deg
Galactic Latitude 32.72 deg
Rate 0.187 deg/day
Direction 103.126 deg

More info »





This Web Site has been visited 87747 times since

and this Page has been visited 556 times since 2011/10/22