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392239 (2009 WP12)
Classification: Jupiter Trojan          SPK-ID: 2392239
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04681749357528083 1.4834e-07  
a 5.160883177918762 3.3631e-07 au
q 4.919263562893775 9.9395e-07 au
i 8.525816821551187 8.3237e-06 deg
node 75.61857203086824 8.1509e-05 deg
peri 272.6586930282887 0.00017243 deg
M 26.16066152777612 0.00013763 deg
tp 2458689.306375690467
(2019-Jul-24.80637569)
0.0016579 TDB
period 4282.372776868975
11.72
0.00041859
1.146e-06
d
yr
n .08406554467759608 8.2173e-09 deg/d
Q 5.402502792943748 3.5206e-07 au
  Orbit Determination Parameters
   # obs. used (total)      91  
   data-arc span      4004 days (10.96 yr)  
   first obs. used      2008-10-07  
   last obs. used      2019-09-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61248  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 13:03:56  

Additional Information
 Earth MOID = 3.92649 au 
 Jupiter MOID = .0529229 au 
 T_jup = 2.976 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457662.5 (2016-Oct-01.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04536503422647391 1.4823e-07  
q 4.919628467523592 9.9119e-07 au
tp 2458686.546398488692
(2019-Jul-22.04639849)
0.0017161 TDB
node 75.62359745100473 8.1517e-05 deg
peri 272.3703799377549 0.00017705 deg
i 8.528213399156162 8.3261e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      91  
   data-arc span      4004 days (10.96 yr)  
   first obs. used      2008-10-07  
   last obs. used      2019-09-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61248  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 13:03:56  

Additional Information
 Jupiter MOID = .0529229 au 
 T_jup = 2.976 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.19711043390821E-14 -1.419826144330509E-13 1.541296541786839E-10 2.710419585490901E-14 1.46142597587946E-11 -3.450235133910394E-14
q -1.419826144330509E-13 9.824601961874956E-13 -1.17169287177711E-9 -1.4410781822726E-13 -1.114367278547562E-10 2.454554672683064E-13
tp 1.541296541786839E-10 -1.17169287177711E-9 2.944967910607549E-6 -1.649034399879505E-10 2.700068777818884E-7 -2.841096483734057E-10
node 2.710419585490901E-14 -1.4410781822726E-13 -1.649034399879505E-10 6.645068769824132E-9 -6.584942287734992E-9 -9.26344550667466E-11
peri 1.46142597587946E-11 -1.114367278547562E-10 2.700068777818884E-7 -6.584942287734992E-9 3.13469388613079E-8 6.444288970079702E-11
i -3.450235133910394E-14 2.454554672683064E-13 -2.841096483734057E-10 -9.26344550667466E-11 6.444288970079702E-11 6.932329256909006E-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 14.1   n/a MPO455784  

392239 (2009 WP12)          Discovered 2009-Nov-16 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2014-04-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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