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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2284554596049335 4.4244e-08  
a 2.264039662479548 1.1302e-08 au
q 1.746807440823984 1.0207e-07 au
i 6.311243885942003 5.5084e-06 deg
node 288.0300923525553 3.5922e-05 deg
peri 25.16481115507624 3.7337e-05 deg
M 199.0275036851288 1.1132e-05 deg
tp 2459756.882742974053
(2022-Jun-26.38274297)
4.0854e-05 TDB
period 1244.298200351355
3.41
9.3171e-06
2.551e-08
d
yr
n .289319714436898 2.1664e-09 deg/d
Q 2.781271884135112 1.3884e-08 au
  Orbit Determination Parameters
   # obs. used (total)      465  
   data-arc span      8217 days (22.50 yr)  
   first obs. used      1998-06-23  
   last obs. used      2020-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57154  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:26:33  

Additional Information
 Earth MOID = .732962 au 
 Jupiter MOID = 2.5046 au 
 T_jup = 3.575 
[ show covariance matrix ]

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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