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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1881833649833368 3.6937e-08  
a 2.281805620646186 7.62e-09 au
q 1.852407760715095 8.3216e-08 au
i 7.22944191639788 4.1082e-06 deg
node 114.9068889832158 3.2071e-05 deg
peri 133.8430152234464 3.3851e-05 deg
M 108.3816233348053 1.049e-05 deg
tp 2458621.473525412634
(2019-May-17.97352541)
3.6232e-05 TDB
period 1258.972938889656
3.45
6.3064e-06
1.727e-08
d
yr
n .285947369383094 1.4324e-09 deg/d
Q 2.711203480577277 9.0539e-09 au
  Orbit Determination Parameters
   # obs. used (total)      936  
   data-arc span      8274 days (22.65 yr)  
   first obs. used      1998-02-27  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51803  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:04:27  

Additional Information
 Earth MOID = .846638 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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