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189310 Polydamas (2006 AJ82)
Classification: Jupiter Trojan          SPK-ID: 2189310
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .075044266606417 5.5508e-08  
a 5.25025163264015 1.492e-07 au
q 4.856250349369525 3.7213e-07 au
i 10.51640846315662 5.8173e-06 deg
node 197.5153998144627 2.4899e-05 deg
peri 42.03417748872663 4.9294e-05 deg
M 6.23126552435517 3.7939e-05 deg
tp 2458924.442444726209
(2020-Mar-15.94244473)
0.00046493 TDB
period 4394.086528899474
12.03
0.0001873
5.128e-07
d
yr
n .08192829104122451 3.4923e-09 deg/d
Q 5.644252915910774 1.6039e-07 au
  Orbit Determination Parameters
   # obs. used (total)      375  
   data-arc span      7262 days (19.88 yr)  
   first obs. used      2000-10-01  
   last obs. used      2020-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51298  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 07:30:21  

Additional Information
 Earth MOID = 3.85364 au 
 Jupiter MOID = .530172 au 
 T_jup = 2.961 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457608.5 (2016-Aug-08.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07199843008763444 5.563e-08  
q 4.859570642749444 3.716e-07 au
tp 2458925.704414943694
(2020-Mar-17.20441494)
0.00048452 TDB
node 197.539303812752 2.4883e-05 deg
peri 42.00437361723733 5.0831e-05 deg
i 10.52560964057966 5.8222e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      375  
   data-arc span      7262 days (19.88 yr)  
   first obs. used      2000-10-01  
   last obs. used      2020-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51298  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 07:30:21  

Additional Information
 Jupiter MOID = .530172 au 
 T_jup = 2.961 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.094657415053128E-15 -1.943622218949361E-14 1.799336895549941E-12 6.909170781860525E-15 2.728576100949098E-13 -2.506298596762532E-15
q -1.943622218949361E-14 1.380834054947239E-13 -4.747307198946824E-11 -3.724900856469136E-14 -5.342240861229637E-12 2.023394014128856E-14
tp 1.799336895549941E-12 -4.747307198946824E-11 2.347610493852722E-7 -2.311941150000573E-11 2.144129306952988E-8 -1.064502563502224E-11
node 6.909170781860525E-15 -3.724900856469136E-14 -2.311941150000573E-11 6.191567148694373E-10 -6.106079352563538E-10 2.975999112953225E-11
peri 2.728576100949098E-13 -5.342240861229637E-12 2.144129306952988E-8 -6.106079352563538E-10 2.583793844187695E-9 -3.04663985781265E-11
i -2.506298596762532E-15 2.023394014128856E-14 -1.064502563502224E-11 2.975999112953225E-11 -3.04663985781265E-11 3.3897496725812E-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 12.8   n/a MPO475596  

189310 Polydamas           Discovered 2006 Jan. 3 by I. R. Ferrín at Mérida.
Polydamas was a Trojan commander whose battle strategy was more cautious than that of his friend Hektor. Polydamas and Hektor were born on the same night.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20091202/MPCPages.arcLast Updated: 2010-04-12

Alternate Designations
 2006 AJ82 = 2007 EA25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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