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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 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1280363618151164 7.0061e-08  
a 2.193578408299622 1.8209e-08 AU
q 1.912720609544744 1.6304e-07 AU
i 5.393106545520275 5.7748e-06 deg
node 76.19910486469963 7.5996e-05 deg
peri 308.6748946374392 8.0799e-05 deg
M 65.27698496553539 3.1687e-05 deg
tp 2456785.327999829452
(2014-May-07.82799983)
0.00010309 JED
period 1186.665102597727
3.25
1.4776e-05
4.045e-08
d
yr
n .3033711863708847 3.7775e-09 deg/d
Q 2.474436207054499 2.0541e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      754  
   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      .58493  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 02:50:46  

Additional Information
 Earth MOID = .9223 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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