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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1280363172716882 4.9483e-08  
a 2.193578421530621 1.0663e-08 AU
q 1.912720718791197 1.0854e-07 AU
i 5.393106221250081 5.4552e-06 deg
node 76.19911597887528 6.2957e-05 deg
peri 308.6748888834668 6.811e-05 deg
M 65.27697145347899 2.7313e-05 deg
tp 2456785.328042422357
(2014-May-07.82804242)
8.9713e-05 JED
period 1186.665113334132
3.25
8.6522e-06
2.369e-08
d
yr
n .3033711836261204 2.2119e-09 deg/d
Q 2.474436124270044 1.2028e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      970  
   data-arc span      13257 days (36.30 yr)  
   first obs. used      1978-11-29  
   last obs. used      2015-03-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53849  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 17:34:37  

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 14.9 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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