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100745 (1998 ET3)
Classification: Main-belt Asteroid          SPK-ID: 2100745
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1881833836606429 3.7761e-08  
a 2.281805622346189 1.0791e-08 au
q 1.852407719477204 8.6374e-08 au
i 7.229440992848724 4.9869e-06 deg
node 114.9068873390054 3.9305e-05 deg
peri 133.843017831133 4.2007e-05 deg
M 108.3816170247836 1.6884e-05 deg
tp 2458621.473547056132
(2019-May-17.97354706)
5.7585e-05 TDB
period 1258.972940296606
3.45
8.9306e-06
2.445e-08
d
yr
n .2859473690635371 2.0284e-09 deg/d
Q 2.711203525215174 1.2821e-08 au
  Orbit Determination Parameters
   # obs. used (total)      767  
   data-arc span      7743 days (21.20 yr)  
   first obs. used      1998-02-27  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5533  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:34:48  

Additional Information
 Earth MOID = .846637 au 
 Jupiter MOID = 2.34484 au 
 T_jup = 3.571 
[ 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 15.7   n/a MPO337987  

100745 (1998 ET3)          Discovered 1998-Mar-02 by Kobayashi, T. at Oizumi
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 ET3 = 2000 YX98 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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