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31411 (1999 AU9)
Classification: Main-belt Asteroid          SPK-ID: 2031411
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1288532838803196 4.6541e-08  
a 2.192989068136173 1.0275e-08 au
q 1.910415225193185 1.025e-07 au
i 5.392729799620701 5.2469e-06 deg
node 76.15194215766817 5.9581e-05 deg
peri 308.7864482124588 6.4441e-05 deg
M 247.2092515945823 2.6699e-05 deg
tp 2457972.141414700586
(2017-Aug-06.64141470)
8.8813e-05 JED
period 1186.186909686155
3.25
8.3367e-06
2.282e-08
d
yr
n .3034934857738819 2.133e-09 deg/d
Q 2.47556291107916 1.1599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1005  
   data-arc span      13651 days (37.37 yr)  
   first obs. used      1978-11-29  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5365  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:58:03  

Additional Information
 Earth MOID = .918829 au 
 Jupiter MOID = 2.96075 au 
 T_jup = 3.655 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9 mag n/a MPO324596  

31411 (1999 AU9)          Discovered 1999-Jan-10 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 AU9 = 1978 WO6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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