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312870 (2011 UA161)
Classification: Main-belt Asteroid          SPK-ID: 2312870
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05014286921486723 8.1067e-08  
a 2.872451160991554 4.7382e-08 au
q 2.728418218099861 2.4231e-07 au
i 11.10746648574785 9.6122e-06 deg
node 244.7273381085047 2.9735e-05 deg
peri 163.0748467214772 8.0008e-05 deg
M 281.2693369364308 7.8541e-05 deg
tp 2459389.382871696376
(2021-Jun-23.88287170)
0.00039359 TDB
period 1778.186901559018
4.87
4.3998e-05
1.205e-07
d
yr
n .2024534089663867 5.0093e-09 deg/d
Q 3.016484103883247 4.9758e-08 au
  Orbit Determination Parameters
   # obs. used (total)      145  
   data-arc span      6513 days (17.83 yr)  
   first obs. used      2001-10-20  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63634  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:30  

Additional Information
 Earth MOID = 1.74112 au 
 Jupiter MOID = 2.2807 au 
 T_jup = 3.268 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457370.5 (2015-Dec-14.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05259402426541864 8.1002e-08  
q 2.721355976308721 2.4369e-07 au
tp 2457598.678557557526
(2016-Jul-29.17855756)
0.00035276 TDB
node 244.7842004062493 2.9694e-05 deg
peri 160.6875681808142 7.7076e-05 deg
i 11.11464751834961 9.6162e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      145  
   data-arc span      6513 days (17.83 yr)  
   first obs. used      2001-10-20  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63634  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:30  

Additional Information
 Jupiter MOID = 2.2807 au 
 T_jup = 3.268 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.561332046428043E-15 -1.941421878878888E-14 7.378647707633493E-12 -3.73982282283139E-14 1.613745987819799E-12 -1.131863256633335E-15
q -1.941421878878888E-14 5.938593816942383E-14 -1.321880831643539E-11 1.007204442776823E-13 -3.094158735739476E-12 9.070620561819982E-15
tp 7.378647707633493E-12 -1.321880831643539E-11 1.244378340409594E-7 -1.175876621376932E-10 2.510711051289619E-8 3.528583809232256E-11
node -3.73982282283139E-14 1.007204442776823E-13 -1.175876621376932E-10 8.817554120546362E-10 -8.883059008523094E-10 5.83608045567809E-11
peri 1.613745987819799E-12 -3.094158735739476E-12 2.510711051289619E-8 -8.883059008523094E-10 5.940681092406243E-9 -5.014826968486457E-11
i -1.131863256633335E-15 9.070620561819982E-15 3.528583809232256E-11 5.83608045567809E-11 -5.014826968486457E-11 9.247038458543154E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO437380  

312870 (2011 UA161)          Discovered 2001-Oct-20 by NEAT at Palomar
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

[ show close-approach data ]
Alternate Designations
 2011 UA161 = 2010 JJ86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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