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442518 (2011 WM85)
Classification: Main-belt Asteroid          SPK-ID: 2442518
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08660409593988087 1.1661e-07  
a 2.793387428128935 5.3063e-08 au
q 2.551468635306 3.3036e-07 au
i 4.750537893694946 8.3028e-06 deg
node 99.85824574544452 0.00012009 deg
peri 320.8966511010308 0.00013376 deg
M 302.5429580320885 6.0017e-05 deg
tp 2459272.667303864328
(2021-Feb-27.16730386)
0.00028757 TDB
period 1705.27799613976
4.67
4.859e-05
1.33e-07
d
yr
n .2111092741564322 6.0153e-09 deg/d
Q 3.03530622095187 5.7658e-08 au
  Orbit Determination Parameters
   # obs. used (total)      79  
   data-arc span      6168 days (16.89 yr)  
   first obs. used      2001-05-24  
   last obs. used      2018-04-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5173  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:32:30  

Additional Information
 Earth MOID = 1.56655 au 
 Jupiter MOID = 2.21918 au 
 T_jup = 3.318 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456879.5 (2014-Aug-10.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0873742244673426 1.1875e-07  
q 2.550556316812675 3.3758e-07 au
tp 2457554.416122832209
(2016-Jun-14.91612283)
0.00026378 TDB
node 99.95590875580504 0.00012043 deg
peri 318.5312574029001 0.00013336 deg
i 4.74459241744585 8.2885e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      79  
   data-arc span      6168 days (16.89 yr)  
   first obs. used      2001-05-24  
   last obs. used      2018-04-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5173  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:32:30  

Additional Information
 Jupiter MOID = 2.21918 au 
 T_jup = 3.318 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.410209949183053E-14 -3.967054190031649E-14 -9.305461303703994E-12 -4.253799686885349E-14 -2.743069574092259E-12 1.074146276648579E-14
q -3.967054190031649E-14 1.139592704719E-13 2.996091591921884E-11 1.208293253059153E-13 8.310881869073496E-12 -2.934325679850584E-14
tp -9.305461303703994E-12 2.996091591921884E-11 6.957922599202558E-8 7.950529209249331E-11 1.51108115412257E-8 -2.78292829550567E-11
node -4.253799686885349E-14 1.208293253059153E-13 7.950529209249331E-11 1.450367327557492E-8 -1.44336284835317E-8 -3.381080783014608E-12
peri -2.743069574092259E-12 8.310881869073496E-12 1.51108115412257E-8 -1.44336284835317E-8 1.778429407233797E-8 -3.233036684403131E-12
i 1.074146276648579E-14 -2.934325679850584E-14 -2.78292829550567E-11 -3.381080783014608E-12 -3.233036684403131E-12 6.869887702161743E-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 16.9   n/a MPO440832  

442518 (2011 WM85)          Discovered 2008-Feb-08 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 WM85 = 2008 CT91 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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