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JPL Small-Body Database Browser
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442535 (2011 WA138)
Classification: Main-belt Asteroid          SPK-ID: 2442535
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03561123352995351 1.3097e-07  
a 2.757131271658162 7.3203e-08 au
q 2.658946426070405 3.2402e-07 au
i 3.171946611208613 1.1176e-05 deg
node 345.3091255626999 0.00014092 deg
peri 152.4139083644413 0.0002525 deg
M 142.7390339366302 0.00022442 deg
tp 2457937.482723176744
(2017-Jul-02.98272318)
0.0010197 TDB
period 1672.186038209691
4.58
6.6596e-05
1.823e-07
d
yr
n .215287050468039 8.5739e-09 deg/d
Q 2.855316117245918 7.581e-08 au
  Orbit Determination Parameters
   # obs. used (total)      78  
   data-arc span      5614 days (15.37 yr)  
   first obs. used      2004-03-15  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57076  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:43:22  

Additional Information
 Earth MOID = 1.6728 au 
 Jupiter MOID = 2.13612 au 
 T_jup = 3.340 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457376.5 (2015-Dec-20.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03414274730915149 1.2932e-07  
q 2.662675210943619 3.1898e-07 au
tp 2457930.161625686086
(2017-Jun-25.66162569)
0.0010776 TDB
node 345.4727285093658 0.00014073 deg
peri 150.742884622779 0.00026294 deg
i 3.175286537460042 1.1177e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      78  
   data-arc span      5614 days (15.37 yr)  
   first obs. used      2004-03-15  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57076  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:43:22  

Additional Information
 Jupiter MOID = 2.13612 au 
 T_jup = 3.340 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.672467712797003E-14 -4.058333840126399E-14 7.774105972583194E-11 1.239955510624833E-14 1.602070687403572E-11 2.066924174016696E-14
q -4.058333840126399E-14 1.017459276232187E-13 -1.480070959872523E-10 -5.765763987611818E-14 -3.057888940724427E-11 -4.787375871716263E-14
tp 7.774105972583194E-11 -1.480070959872523E-10 1.161187121163996E-6 -3.417814455835672E-10 2.393857614551389E-7 1.165404363141681E-10
node 1.239955510624833E-14 -5.765763987611818E-14 -3.417814455835672E-10 1.98054677203414E-8 -1.984414713557447E-8 -6.096927227876968E-10
peri 1.602070687403572E-11 -3.057888940724427E-11 2.393857614551389E-7 -1.984414713557447E-8 6.913485024785481E-8 6.327816048068933E-10
i 2.066924174016696E-14 -4.787375871716263E-14 1.165404363141681E-10 -6.096927227876968E-10 6.327816048068933E-10 1.249191359069778E-10

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.5   n/a MPO349190  

442535 (2011 WA138)          Discovered 2007-Dec-17 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 WA138 = 2013 CV134 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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