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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1280363641281259 6.4377e-08  
a 2.193578407602563 1.6288e-08 AU
q 1.912720603863167 1.4831e-07 AU
i 5.393106665180304 5.7716e-06 deg
node 76.19908939124682 7.3579e-05 deg
peri 308.6749093849794 7.8414e-05 deg
M 65.27698604756173 3.0123e-05 deg
tp 2456785.327996365341
(2014-May-07.82799637)
9.8254e-05 JED
period 1186.665102032093
3.25
1.3217e-05
3.619e-08
d
yr
n .3033711865154891 3.379e-09 deg/d
Q 2.47443621134196 1.8374e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      769  
   data-arc span      13117 days (35.91 yr)  
   first obs. used      1978-11-29  
   last obs. used      2014-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58519  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:58:49  

Additional Information
 Earth MOID = .922299 AU 
 T_jup = 3.654 
[ 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 14.8 mag n/a MPO231628  

31411 (1999 AU9)          Discovered 1999-Jan-10 by BAO Schmidt CCD Asteroid Program at Xinglong (327)
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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