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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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1280363147493527 5.0884e-08  
a 2.193578422325271 1.1237e-08 AU
q 1.912720725017044 1.1237e-07 AU
i 5.393105453727059 5.5403e-06 deg
node 76.19911389317436 6.5059e-05 deg
peri 308.6748907842845 7.0118e-05 deg
M 65.27697109679423 2.7545e-05 deg
tp 2456785.328043481171
(2014-May-07.82804348)
9.0415e-05 JED
period 1186.665113978958
3.25
9.1187e-06
2.497e-08
d
yr
n .3033711834612706 2.3312e-09 deg/d
Q 2.474436119633498 1.2676e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      835  
   data-arc span      13209 days (36.16 yr)  
   first obs. used      1978-11-29  
   last obs. used      2015-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5691  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 14:25:11  

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 (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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