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100939 (1998 MG46)
Classification: Main-belt Asteroid          SPK-ID: 2100939
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2284554564523429 4.2981e-08  
a 2.264039651646891 1.1097e-08 au
q 1.746807439603698 9.9648e-08 au
i 6.311242592750894 5.1552e-06 deg
node 288.0300989726 3.4713e-05 deg
peri 25.16480553142968 3.595e-05 deg
M 199.0275069465984 1.0856e-05 deg
tp 2459756.882727708011
(2022-Jun-26.38272771)
4.0117e-05 TDB
period 1244.298191421042
3.41
9.148e-06
2.505e-08
d
yr
n .289319716513342 2.127e-09 deg/d
Q 2.781271863690085 1.3632e-08 au
  Orbit Determination Parameters
   # obs. used (total)      488  
   data-arc span      8296 days (22.71 yr)  
   first obs. used      1998-06-23  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57119  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:27  

Additional Information
 Earth MOID = .732962 au 
 Jupiter MOID = 2.5046 au 
 T_jup = 3.575 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457163.5 (2015-May-21.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .228888628228645 4.2866e-08  
q 1.745412617581904 9.9383e-08 au
tp 2457268.952043678866
(2015-Sep-03.45204368)
3.1033e-05 TDB
node 288.0872945108169 3.4731e-05 deg
peri 25.19924889535828 3.5964e-05 deg
i 6.310339855441896 5.1543e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      488  
   data-arc span      8296 days (22.71 yr)  
   first obs. used      1998-06-23  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57119  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:27  

Additional Information
 Jupiter MOID = 2.5046 au 
 T_jup = 3.575 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.837527027885864E-15 -4.245357420306277E-15 -4.626953078009159E-13 -4.131316026159786E-14 -1.020890339902834E-13 -6.229777433208288E-17
q -4.245357420306277E-15 9.877012238570661E-15 1.118353410553114E-12 9.487938339258423E-14 2.471144024258483E-13 4.831982850719876E-16
tp -4.626953078009159E-13 1.118353410553114E-12 9.630600312218993E-10 1.316912404711528E-11 2.996269817970474E-10 -1.326089082084559E-12
node -4.131316026159786E-14 9.487938339258423E-14 1.316912404711528E-11 1.206272889807332E-9 -1.193843024607987E-9 -2.273413047337664E-11
peri -1.020890339902834E-13 2.471144024258483E-13 2.996269817970474E-10 -1.193843024607987E-9 1.293429220768189E-9 2.216741083055754E-11
i -6.229777433208288E-17 4.831982850719876E-16 -1.326089082084559E-12 -2.273413047337664E-11 2.216741083055754E-11 2.656664687435849E-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 16.2   n/a MPO439690  

100939 (1998 MG46)          Discovered 1998-Jun-23 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 MG46 = 1999 XG217 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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