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100936 Mekong (1998 ME43)
Classification: Main-belt Asteroid          SPK-ID: 2100936
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .131490188969878 3.5194e-08  
a 2.408559104712715 1.0974e-08 au
q 2.09185721288892 8.9774e-08 au
i 2.604358836126433 3.2586e-06 deg
node 283.4852803586979 0.00010568 deg
peri 358.2261646364776 0.00010755 deg
M 8.465527687237064 1.9037e-05 deg
tp 2459168.394020597026
(2020-Nov-14.89402060)
7.2236e-05 TDB
period 1365.319801918102
3.74
9.3313e-06
2.555e-08
d
yr
n .2636744881999408 1.8021e-09 deg/d
Q 2.725260996536509 1.2417e-08 au
  Orbit Determination Parameters
   # obs. used (total)      729  
   data-arc span      10016 days (27.42 yr)  
   first obs. used      1993-01-21  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60745  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:26  

Additional Information
 Earth MOID = 1.07349 au 
 Jupiter MOID = 2.39665 au 
 T_jup = 3.508 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457323.5 (2015-Oct-28.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .131110598275511 3.5199e-08  
q 2.093093597297324 8.9696e-08 au
tp 2457802.119991401249
(2017-Feb-17.61999140)
7.4535e-05 TDB
node 283.5791185798381 0.00010561 deg
peri 357.7944532874083 0.00010749 deg
i 2.605197191324134 3.2589e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      729  
   data-arc span      10016 days (27.42 yr)  
   first obs. used      1993-01-21  
   last obs. used      2020-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60745  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:26  

Additional Information
 Jupiter MOID = 2.39665 au 
 T_jup = 3.508 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.238980372988049E-15 -3.143612570385574E-15 2.454352204601738E-13 -4.397348826313897E-15 1.352516938111494E-13 -4.52016465058611E-16
q -3.143612570385574E-15 8.04541564933733E-15 -7.812715850581444E-13 1.329167756589057E-14 -3.927026467803263E-13 1.138954989546278E-15
tp 2.454352204601738E-13 -7.812715850581444E-13 5.555410628090692E-9 4.221527399779891E-11 1.512248912811647E-9 2.484006429029695E-12
node -4.397348826313897E-15 1.329167756589057E-14 4.221527399779891E-11 1.115403806499683E-8 -1.113115673328282E-8 -2.534875998221127E-11
peri 1.352516938111494E-13 -3.927026467803263E-13 1.512248912811647E-9 -1.113115673328282E-8 1.155404640863083E-8 2.598599182617695E-11
i -4.52016465058611E-16 1.138954989546278E-15 2.484006429029695E-12 -2.534875998221127E-11 2.598599182617695E-11 1.06205480077022E-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 16.12   n/a E2021B55  

100936 Mekong           Discovered 1998 June 26 by E. W. Elst at the European Southern Observatory.
The Mekong is a 4350-kilometre river flowing through China, Myanmar, Laos, Thailand, Cambodia and Vietnam.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-03-12Last Updated: 2017-03-14

[ show close-approach data ]
Alternate Designations
 1998 ME43 = 2002 PR74 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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