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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1880156844946166 3.6663e-08  
a 2.282115840648398 7.343e-09 au
q 1.853042268772882 8.2515e-08 au
i 7.229404312996466 3.7042e-06 deg
node 114.9073455550811 3.0871e-05 deg
peri 133.856900735831 3.2202e-05 deg
M 165.5588249213402 9.8096e-06 deg
tp 2458621.398366935080
(2019-May-17.89836694)
3.331e-05 TDB
period 1259.2296907303
3.45
6.0776e-06
1.664e-08
d
yr
n .2858890658710686 1.3798e-09 deg/d
Q 2.711189412523914 8.7236e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1000  
   data-arc span      8381 days (22.95 yr)  
   first obs. used      1998-02-27  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50883  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:33:35  

Additional Information
 Earth MOID = .845689 au 
 Jupiter MOID = 2.34381 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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