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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1249098798553237 8.1861e-08  
a 2.270085666879382 2.9926e-08 au
q 1.986529538968186 2.0677e-07 au
i 6.701683360435484 5.8481e-06 deg
node 269.5457278599814 7.2576e-05 deg
peri 29.61352804589326 8.137e-05 deg
M 288.3176060363525 3.8286e-05 deg
tp 2459249.254987445959
(2021-Feb-03.75498745)
0.00013319 TDB
period 1249.285780354378
3.42
2.4704e-05
6.764e-08
d
yr
n .2881646502835249 5.6983e-09 deg/d
Q 2.553641794790578 3.3664e-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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57445  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 18:47:12  

Additional Information
 Earth MOID = .973712 au 
 Jupiter MOID = 2.62246 au 
 T_jup = 3.594 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457529.5 (2016-May-21.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1248250391342972 8.1801e-08  
q 1.987462310261845 2.0669e-07 au
tp 2457998.577455926460
(2017-Sep-02.07745593)
0.00013357 TDB
node 269.6090769963685 7.2599e-05 deg
peri 29.24503425112962 8.1413e-05 deg
i 6.699877873421828 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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57445  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 18:47:12  

Additional Information
 Jupiter MOID = 2.62246 au 
 T_jup = 3.594 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.691394353992386E-15 -1.685231182817254E-14 2.586611403765688E-12 7.162786970323586E-15 9.712094078732045E-13 -4.164854288538648E-15
q -1.685231182817254E-14 4.272008859755913E-14 -6.207372852982355E-12 -5.215092139756766E-15 -2.39253319871392E-12 1.188974359125833E-14
tp 2.586611403765688E-12 -6.207372852982355E-12 1.784041162237682E-8 1.169806084601796E-10 4.987514087904544E-9 9.353702912253182E-12
node 7.162786970323586E-15 -5.215092139756766E-15 1.169806084601796E-10 5.27064230134214E-9 -5.202208196166305E-9 -8.851736535058301E-11
peri 9.712094078732045E-13 -2.39253319871392E-12 4.987514087904544E-9 -5.202208196166305E-9 6.628141012903296E-9 9.029934840585042E-11
i -4.164854288538648E-15 1.188974359125833E-14 9.353702912253182E-12 -8.851736535058301E-11 9.029934840585042E-11 3.417002917576661E-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 17.1   n/a MPO471271  

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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