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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1279346839006573 7.5414e-08  
a 2.19314065653932 1.9085e-08 AU
q 1.912561899895282 1.7411e-07 AU
i 5.393591038479149 6.129e-06 deg
node 76.19998938745766 7.9439e-05 deg
peri 308.5963961023909 8.4005e-05 deg
M 4.665040730544931 3.1658e-05 deg
tp 2456785.127266621081
(2014-May-07.62726662)
0.00010422 JED
period 1186.309902971477
3.25
1.5485e-05
4.24e-08
d
yr
n .303462020420018 3.9612e-09 deg/d
Q 2.473719413183358 2.1527e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      753  
   data-arc span      12702 days (34.78 yr)  
   first obs. used      1978-11-29  
   last obs. used      2013-09-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59013  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Sep-24 03:38:22  

Additional Information
 Earth MOID = .920983 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 14.8 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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