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8317 Eurysaces (4523 P-L)
Classification: Jupiter Trojan          SPK-ID: 2008317
[ 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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04654480493286517 4.6464e-08  
a 5.303191607372371 7.5596e-08 au
q 5.056355588485617 2.6416e-07 au
i .9461349045131792 5.2965e-06 deg
node 208.0978793674288 0.00026317 deg
peri 114.6085471023984 0.00026885 deg
M 46.67692100168177 5.2652e-05 deg
tp 2458422.132201884454
(2018-Oct-30.63220188)		 0.00065709 TDB
period 4460.714264209812
12.21		 9.538e-05
2.611e-07		 d
yr
n .08070456403998605 1.7256e-09 deg/d
Q 5.550027626259125 7.9115e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1705  
   data-arc span      21864 days (59.86 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51478  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:58:02  

Additional Information
 Earth MOID = 4.04398 au 
 Jupiter MOID = .118041 au 
 T_jup = 2.998 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456604.5 (2013-Nov-08.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04496828601526531 4.6763e-08  
q 5.050493382449419 2.6497e-07 au
tp 2458432.538982996009
(2018-Nov-10.03898300)		 0.00067474 TDB
node 208.1057737476533 0.00026316 deg
peri 115.4566445498409 0.00026919 deg
i .9464116834379059 5.3024e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      1705  
   data-arc span      21864 days (59.86 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51478  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:58:02  

Additional Information
 Jupiter MOID = .118041 au 
 T_jup = 2.998 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.186820406074308E-15 -1.192175875469566E-14 1.244165487972527E-11 -1.645677400080289E-15 1.066949096951848E-12 -7.169966628350045E-17
q -1.192175875469566E-14 7.020797366843896E-14 -8.467318544474582E-11 9.717348130088846E-15 -7.417523751021593E-12 4.409309668451426E-16
tp 1.244165487972527E-11 -8.467318544474582E-11 4.552771049105361E-7 -4.64472932806457E-11 3.823791918555902E-8 -5.255770537972911E-13
node -1.645677400080289E-15 9.717348130088846E-15 -4.64472932806457E-11 6.925353044577E-8 -6.924782596743786E-8 -4.685232700833046E-10
peri 1.066949096951848E-12 -7.417523751021593E-12 3.823791918555902E-8 -6.924782596743786E-8 7.246465289911621E-8 4.68411304069323E-10
i -7.169966628350045E-17 4.409309668451426E-16 -5.255770537972911E-13 -4.685232700833046E-10 4.68411304069323E-10 2.811570300780697E-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 11.1   n/a MPO458912  
diameter diameter 26.210 km 0.394 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.076   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

8317 Eurysaces           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Named for the son of Ajax by Tecmessa, known for his enormous shield.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19981005/MPCPages.arcLast Updated: 2009-11-17

Alternate Designations
 4523 P-L = 1977 CE1 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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