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22227 Polyxenos (5030 T-2)
Classification: Jupiter Trojan          SPK-ID: 2022227
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .134126041346265 6.0566e-08  
a 5.228612521782681 1.5358e-07 au
q 4.527319422502458 4.1377e-07 au
i 10.95099704156595 7.0926e-06 deg
node 289.8690861094011 4.1084e-05 deg
peri 157.7265723707382 5.6616e-05 deg
M 283.3365655661804 4.2755e-05 deg
tp 2460130.459178795481
(2023-Jul-04.95917880)
0.00054566 TDB
period 4366.948948202674
11.96
0.00019241
5.268e-07
d
yr
n .08243741895543957 3.6322e-09 deg/d
Q 5.929905621062904 1.7418e-07 au
  Orbit Determination Parameters
   # obs. used (total)      607  
   data-arc span      17288 days (47.33 yr)  
   first obs. used      1973-09-20  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54176  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:02:41  

Additional Information
 Earth MOID = 3.5466 au 
 Jupiter MOID = .656924 au 
 T_jup = 2.946 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457849.5 (2017-Apr-06.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326269662096107 6.0563e-08  
q 4.537593125997429 4.1359e-07 au
tp 2455765.059583955461
(2011-Jul-22.55958396)
0.00044813 TDB
node 289.8708171849983 4.1084e-05 deg
peri 157.8474382892722 5.7023e-05 deg
i 10.94781413985094 7.0861e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      607  
   data-arc span      17288 days (47.33 yr)  
   first obs. used      1973-09-20  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54176  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:02:41  

Additional Information
 Jupiter MOID = .656924 au 
 T_jup = 2.946 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.667871660961083E-15 -2.426753780892632E-14 9.978183591230353E-13 -7.26663956147811E-15 -5.02814722557221E-14 -3.466823203811775E-15
q -2.426753780892632E-14 1.710558847442448E-13 1.810583703229758E-11 5.872157179568992E-14 2.915293201227297E-12 3.65250965812212E-14
tp 9.978183591230353E-13 1.810583703229758E-11 2.008183693089487E-7 -1.136691512726439E-10 1.783592763991174E-8 3.198844139261231E-11
node -7.26663956147811E-15 5.872157179568992E-14 -1.136691512726439E-10 1.687872125652102E-9 -1.665238701881573E-9 1.882750158569693E-10
peri -5.02814722557221E-14 2.915293201227297E-12 1.783592763991174E-8 -1.665238701881573E-9 3.251617626573812E-9 -1.813190132942043E-10
i -3.466823203811775E-15 3.65250965812212E-14 3.198844139261231E-11 1.882750158569693E-10 -1.813190132942043E-10 5.021273232060586E-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 11.92   n/a MPCxxxxx  

22227 Polyxenos           Discovered 1973 Sept. 25 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Polyxenos came from Elis and fought against the Trojans.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 5030 T-2 = 1989 EN4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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