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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1287048730705069 4.9506e-08  
a 2.193211002809913 1.0799e-08 au
q 1.910934059076424 1.0862e-07 au
i 5.39245111614211 5.4433e-06 deg
node 76.15386364904278 6.2975e-05 deg
peri 308.7932755085532 6.806e-05 deg
M 186.4950656718855 2.7343e-05 deg
tp 2457972.279236371739
(2017-Aug-06.77923637)
9.1221e-05 JED
period 1186.366980806216
3.25
8.7624e-06
2.399e-08
d
yr
n .3034474204224362 2.2412e-09 deg/d
Q 2.475487946543403 1.2189e-08 au
  Orbit Determination Parameters
   # obs. used (total)      979  
   data-arc span      13291 days (36.39 yr)  
   first obs. used      1978-11-29  
   last obs. used      2015-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53621  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 17:04:37  

Additional Information
 Earth MOID = .919139 au 
 Jupiter MOID = 2.96224 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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