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102881 (1999 WE18)
Classification: Main-belt Asteroid          SPK-ID: 2102881
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1632887629170291 4.8497e-08  
a 2.246803597116688 6.9e-09 au
q 1.879925817225973 1.0942e-07 au
i 7.095708948739892 4.3337e-06 deg
node 235.1619363110646 3.6794e-05 deg
peri 126.1077742427167 3.9407e-05 deg
M 129.1139512840562 1.1816e-05 deg
tp 2458759.319037392422
(2019-Oct-02.81903739)
4.0456e-05 TDB
period 1230.116071572359
3.37
5.6666e-06
1.551e-08
d
yr
n .2926553097870194 1.3481e-09 deg/d
Q 2.613681377007404 8.0267e-09 au
  Orbit Determination Parameters
   # obs. used (total)      611  
   data-arc span      8271 days (22.64 yr)  
   first obs. used      1998-05-24  
   last obs. used      2021-01-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46384  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:32:40  

Additional Information
 Earth MOID = .886572 au 
 Jupiter MOID = 2.88092 au 
 T_jup = 3.603 
[ 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 16.6   n/a MPO502731  

102881 (1999 WE18)          Discovered 1999-Nov-30 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 WE18 = 2002 OA14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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