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312494 (2009 AJ13)
Classification: Main-belt Asteroid          SPK-ID: 2312494
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1251020300705654 8.1808e-08  
a 2.270648315887233 2.9913e-08 au
q 1.986585601993429 2.0674e-07 au
i 6.701090535537959 5.8474e-06 deg
node 269.5460046059338 7.2581e-05 deg
peri 29.54585565126962 8.1366e-05 deg
M 346.0116476181935 3.832e-05 deg
tp 2459249.060964318377
(2021-Feb-03.56096432)
0.0001331 TDB
period 1249.750269184884
3.42
2.4696e-05
6.761e-08
d
yr
n .2880575494773051 5.6923e-09 deg/d
Q 2.554711029781036 3.3656e-08 au
  Orbit Determination Parameters
   # obs. used (total)      201  
   data-arc span      5676 days (15.54 yr)  
   first obs. used      2004-11-09  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57442  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:30:09  

Additional Information
 Earth MOID = .971789 au 
 Jupiter MOID = 2.62048 au 
 T_jup = 3.593 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457529.5 (2016-May-21.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .124825037899132 8.1801e-08  
q 1.987462313647579 2.0669e-07 au
tp 2457998.577456132704
(2017-Sep-02.07745613)
0.00013357 TDB
node 269.6090771133474 7.2599e-05 deg
peri 29.24503419557094 8.1413e-05 deg
i 6.699877876296343 5.8455e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      201  
   data-arc span      5676 days (15.54 yr)  
   first obs. used      2004-11-09  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57442  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:30:09  

Additional Information
 Jupiter MOID = 2.62048 au 
 T_jup = 3.593 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.691389989966059E-15 -1.685229999948302E-14 2.586607001842376E-12 7.162758260175402E-15 9.712083310836288E-13 -4.164851248701048E-15
q -1.685229999948302E-14 4.272005622965724E-14 -6.207362621210353E-12 -5.215031315459404E-15 -2.3925306869996E-12 1.188973277543347E-14
tp 2.586607001842376E-12 -6.207362621210353E-12 1.78404127517857E-8 1.169806283369261E-10 4.987514721194495E-9 9.353709964988433E-12
node 7.162758260175402E-15 -5.215031315459404E-15 1.169806283369261E-10 5.270642228360982E-9 -5.202208116574111E-9 -8.851737881604316E-11
peri 9.712083310836288E-13 -2.3925306869996E-12 4.987514721194495E-9 -5.202208116574111E-9 6.628141182015903E-9 9.029936343764186E-11
i -4.164851248701048E-15 1.188973277543347E-14 9.353709964988433E-12 -8.851737881604316E-11 9.029936343764186E-11 3.417003032759744E-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 17.23   n/a E2021B25  

312494 (2009 AJ13)          Discovered 2009-Jan-02 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

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