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442500 (2011 WG2)
Classification: Outer Main-belt Asteroid          SPK-ID: 2442500
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07912865837493074 7.3886e-08  
a 3.543538752900111 9.5073e-08 au
q 3.26314328548355 2.7824e-07 au
i 19.13575830764558 9.1917e-06 deg
node 74.51992939129445 2.5403e-05 deg
peri 307.863337732664 6.3408e-05 deg
M 142.3015676772313 5.9769e-05 deg
tp 2458037.422158674425
(2017-Oct-10.92215867)
0.00039378 TDB
period 2436.431506247427
6.67
9.8054e-05
2.685e-07
d
yr
n .1477570779547459 5.9464e-09 deg/d
Q 3.823934220316672 1.026e-07 au
  Orbit Determination Parameters
   # obs. used (total)      86  
   data-arc span      4396 days (12.04 yr)  
   first obs. used      2008-04-06  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61459  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 03:53:58  

Additional Information
 Earth MOID = 2.30734 au 
 Jupiter MOID = 1.61539 au 
 T_jup = 3.023 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457550.5 (2016-Jun-11.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07849607441879825 7.3989e-08  
q 3.2663577368568 2.7822e-07 au
tp 2458042.010440311195
(2017-Oct-15.51044031)
0.0003967 TDB
node 74.54241351968709 2.5401e-05 deg
peri 308.7151516675123 6.3777e-05 deg
i 19.13488750913021 9.191e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      86  
   data-arc span      4396 days (12.04 yr)  
   first obs. used      2008-04-06  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61459  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 03:53:58  

Additional Information
 Jupiter MOID = 1.61539 au 
 T_jup = 3.023 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.474383920336035E-15 -1.95494224359202E-14 2.323862181042703E-12 -1.532767773699631E-14 3.715414758495174E-13 -2.486588144540598E-15
q -1.95494224359202E-14 7.740455432377227E-14 -2.630768150627414E-13 4.834182502659375E-14 -4.40424055271301E-13 2.356862611567303E-14
tp 2.323862181042703E-12 -2.630768150627414E-13 1.573700093047462E-7 -1.138735371103464E-10 2.32737276053555E-8 2.582787584383707E-12
node -1.532767773699631E-14 4.834182502659375E-14 -1.138735371103464E-10 6.452163336936973E-10 -6.255235549437978E-10 1.234127340389052E-11
peri 3.715414758495174E-13 -4.40424055271301E-13 2.32737276053555E-8 -6.255235549437978E-10 4.067502859233808E-9 -1.172024155796718E-11
i -2.486588144540598E-15 2.356862611567303E-14 2.582787584383707E-12 1.234127340389052E-11 -1.172024155796718E-11 8.447479940607253E-11

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 15.4   n/a MPO437721  

442500 (2011 WG2)          Discovered 2008-Apr-06 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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