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(1999 LE31)
Classification: Centaur          SPK-ID: 3021708
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4708974559120518 4.3769e-07  
a 8.210381201672346 7.1823e-07 au
q 4.344133581736703 3.9591e-06 au
i 151.76614542 1.7651e-05 deg
node 292.163995135084 4.2181e-05 deg
peri 31.88750810561447 7.2776e-05 deg
M 342.7568357953932 3.5808e-05 deg
tp 2459612.083420770088
(2022-Feb-01.58342077)
0.0008828 TDB
period 8592.972247961638
23.53
0.0011275
3.087e-06
d
yr
n .04189470064742692 5.4973e-09 deg/d
Q 12.07662882160799 1.0564e-06 au
  Orbit Determination Parameters
   # obs. used (total)      145  
   data-arc span      7756 days (21.23 yr)  
   first obs. used      1999-05-17  
   last obs. used      2020-08-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54928  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 20:50:34  

Additional Information
 Earth MOID = 3.36225 au 
 Jupiter MOID = .516295 au 
 T_jup = -1.319 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.5   n/a MPO456491  
diameter diameter 16.8 km 4.2 Fernandez et al. (2005) Astron.J. 130:308-318  
geometric albedo albedo 0.056   0.026 Fernandez et al. (2005) Astron.J. 130:308-318  

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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