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101818 (1999 JD13)
Classification: Mars-crossing Asteroid          SPK-ID: 2101818
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2671139613265877 4.3339e-08  
a 2.191785643281681 8.6434e-09 au
q 1.606329097725968 9.7816e-08 au
i 5.673813329543702 6.4177e-06 deg
node 219.9648866126803 4.0831e-05 deg
peri 54.37738982061187 4.2934e-05 deg
M 187.5448492503492 1.6796e-05 deg
tp 2459568.265779333203
(2021-Dec-19.76577933)
5.7645e-05 TDB
period 1185.210645616897
3.24
7.0109e-06
1.919e-08
d
yr
n .3037434749099992 1.7967e-09 deg/d
Q 2.777242188837394 1.0952e-08 au
  Orbit Determination Parameters
   # obs. used (total)      455  
   data-arc span      7563 days (20.71 yr)  
   first obs. used      1999-05-14  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55733  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:27:03  

Additional Information
 Earth MOID = .598707 au 
 Jupiter MOID = 2.35815 au 
 T_jup = 3.619 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457118.5 (2015-Apr-06.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2669261657351341 4.3259e-08  
q 1.606432610103496 9.7579e-08 au
tp 2457198.412146320090
(2015-Jun-24.91214632)
4.8754e-05 TDB
node 219.9748085853994 4.0827e-05 deg
peri 54.41268095086593 4.2943e-05 deg
i 5.673861036606403 6.4187e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      455  
   data-arc span      7563 days (20.71 yr)  
   first obs. used      1999-05-14  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55733  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:27:03  

Additional Information
 Jupiter MOID = 2.35815 au 
 T_jup = 3.619 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.871381825707751E-15 -4.21393581706489E-15 -1.006116215643303E-12 -1.938591953138586E-14 -2.812291391510402E-13 -4.73969512101616E-16
q -4.21393581706489E-15 9.521703193077827E-15 2.373840562659956E-12 4.427482678149831E-14 6.595501800662693E-13 1.440339564254089E-15
tp -1.006116215643303E-12 2.373840562659956E-12 2.376958077059869E-9 2.242343981707171E-11 6.587073255154776E-10 3.821236676473765E-13
node -1.938591953138586E-14 4.427482678149831E-14 2.242343981707171E-11 1.666837481881586E-9 -1.651352697365708E-9 -1.908319260118119E-11
peri -2.812291391510402E-13 6.595501800662693E-13 6.587073255154776E-10 -1.651352697365708E-9 1.844116831580111E-9 1.921931944423672E-11
i -4.73969512101616E-16 1.440339564254089E-15 3.821236676473765E-13 -1.908319260118119E-11 1.921931944423672E-11 4.119913669680756E-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 16.6   n/a MPO436476  

101818 (1999 JD13)          Discovered 1999-May-14 by Tholen, D. J., Whiteley, R. at Mauna Kea
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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