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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07610327967246105 5.6227e-08  
a 5.258822595889036 1.451e-07 au
q 4.858608949126236 3.7282e-07 au
i 10.51210093430807 5.8145e-06 deg
node 197.4537687255213 2.49e-05 deg
peri 43.1275981945257 4.8757e-05 deg
M 37.6911223806514 3.6547e-05 deg
tp 2458935.322854563186
(2020-Mar-26.82285456)
0.00045801 TDB
period 4404.850847383646
12.06
0.0001823
4.991e-07
d
yr
n .08172807944537544 3.3825e-09 deg/d
Q 5.659036242651837 1.5614e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51297  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:03:02  

Additional Information
 Earth MOID = 3.85655 au 
 Jupiter MOID = .524217 au 
 T_jup = 2.961 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457608.5 (2016-Aug-08.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07199842996350861 5.563e-08  
q 4.859570644654518 3.716e-07 au
tp 2458925.704412556382
(2020-Mar-17.20441256)
0.00048452 TDB
node 197.5393038170606 2.4883e-05 deg
peri 42.00437336977848 5.0831e-05 deg
i 10.52560963656681 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51297  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:03:02  

Additional Information
 Jupiter MOID = .524217 au 
 T_jup = 2.961 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.094657412480567E-15 -1.943622213279669E-14 1.799337147972359E-12 6.909169836635624E-15 2.728576319115901E-13 -2.506298529897857E-15
q -1.943622213279669E-14 1.380834048119642E-13 -4.747307617178196E-11 -3.724899898393464E-14 -5.342241230251241E-12 2.023393927769998E-14
tp 1.799337147972359E-12 -4.747307617178196E-11 2.347610617101106E-7 -2.311941879759873E-11 2.144129423663469E-8 -1.064502593223824E-11
node 6.909169836635624E-15 -3.724899898393464E-14 -2.311941879759873E-11 6.191567201140558E-10 -6.106079411855609E-10 2.975999087512406E-11
peri 2.728576319115901E-13 -5.342241230251241E-12 2.144129423663469E-8 -6.106079411855609E-10 2.583793959385931E-9 -3.046639834804716E-11
i -2.506298529897857E-15 2.023393927769998E-14 -1.064502593223824E-11 2.975999087512406E-11 -3.046639834804716E-11 3.389749651110613E-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 13.02   n/a E2021B55  

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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