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70950 (1999 WU18)
Classification: Main-belt Asteroid          SPK-ID: 2070950
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1376587705860201 3.1085e-08  
a 2.651276344688394 1.3198e-08 au
q 2.286304902594793 8.0526e-08 au
i 2.222283476633085 3.9353e-06 deg
node 60.09660640287078 0.00010571 deg
peri 216.3844940533077 0.00010724 deg
M 32.43730817341421 1.6723e-05 deg
tp 2458858.423179877589
(2020-Jan-09.92317988)
7.3175e-05 TDB
period 1576.81565223063
4.32
1.1774e-05
3.224e-08
d
yr
n .2283082359632395 1.7047e-09 deg/d
Q 3.016247786781996 1.5015e-08 au
  Orbit Determination Parameters
   # obs. used (total)      519  
   data-arc span      10077 days (27.59 yr)  
   first obs. used      1993-03-19  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5461  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:58:28  

Additional Information
 Earth MOID = 1.27038 au 
 Jupiter MOID = 2.09448 au 
 T_jup = 3.376 
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Orbital Elements at Epoch 2457516.5 (2016-May-08.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1367671495138074 3.1057e-08  
q 2.28886616974253 8.0309e-08 au
tp 2457283.182632771793
(2015-Sep-17.68263277)
7.4287e-05 TDB
node 60.11786257952067 0.00010561 deg
peri 216.7396824410547 0.00010717 deg
i 2.223506120345485 3.937e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      519  
   data-arc span      10077 days (27.59 yr)  
   first obs. used      1993-03-19  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5461  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:58:28  

Additional Information
 Jupiter MOID = 2.09448 au 
 T_jup = 3.376 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.645341553072374E-16 -2.470644861778991E-15 -2.144409868148657E-13 -1.330678694883227E-15 -4.970652752670124E-14 -1.03811412751482E-16
q -2.470644861778991E-15 6.449589294297934E-15 4.688489890428063E-13 2.969754618461083E-15 1.127415683052092E-13 3.398985979092313E-16
tp -2.144409868148657E-13 4.688489890428063E-13 5.518590913152823E-9 -3.045170453736379E-12 1.371571055357561E-9 -1.317255076704563E-12
node -1.330678694883227E-15 2.969754618461083E-15 -3.045170453736379E-12 1.115251319941629E-8 -1.114470858502942E-8 -9.832780256524964E-11
peri -4.970652752670124E-14 1.127415683052092E-13 1.371571055357561E-9 -1.114470858502942E-8 1.148433815590169E-8 9.793178863869494E-11
i -1.03811412751482E-16 3.398985979092313E-16 -1.317255076704563E-12 -9.832780256524964E-11 9.793178863869494E-11 1.54997463911024E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO432263  

70950 (1999 WU18)          Discovered 1999-Nov-30 by Spacewatch at Kitt Peak
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 WU18 = 1993 FG40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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