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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 ]

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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04660503502395703 3.9657e-08  
a 5.305100798257651 6.8686e-08 au
q 5.057856389749231 2.1145e-07 au
i .9458979085337695 5.2275e-06 deg
node 208.1001149499336 0.00022153 deg
peri 115.0808898816011 0.00022787 deg
M 62.35684953895901 5.1489e-05 deg
tp 2458427.426918576476
(2018-Nov-04.92691858)
0.00064343 TDB
period 4463.123319573573
12.22
8.6677e-05
2.373e-07
d
yr
n .08066100222263095 1.5665e-09 deg/d
Q 5.552345206766072 7.1887e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2063  
   data-arc span      22031 days (60.32 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48286  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:42:38  

Additional Information
 Earth MOID = 4.04361 au 
 Jupiter MOID = .115228 au 
 T_jup = 2.998 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457067.5 (2015-Feb-14.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04489310945544966 3.9559e-08  
q 5.054146738505578 2.0937e-07 au
tp 2458421.053916753469
(2018-Oct-29.55391675)
0.0006691 TDB
node 208.1095264483874 0.00022149 deg
peri 114.4532670605085 0.00022837 deg
i .9462862582401687 5.2326e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2063  
   data-arc span      22031 days (60.32 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48286  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:42:38  

Additional Information
 Jupiter MOID = .115228 au 
 T_jup = 2.998 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.564907900980043E-15 -7.873045469187055E-15 9.399301763716201E-12 -7.272437015912867E-16 7.495137709171737E-13 -5.599085813454677E-17
q -7.873045469187055E-15 4.383668119396921E-14 -6.465273644247649E-11 4.512177217285224E-15 -5.330188872398854E-12 3.314288434522233E-16
tp 9.399301763716201E-12 -6.465273644247649E-11 4.476934175316394E-7 -3.083940783875526E-11 3.722221101695995E-8 -6.021298875328365E-13
node -7.272437015912867E-16 4.512177217285224E-15 -3.083940783875526E-11 4.90576301895937E-8 -4.905337460206063E-8 -3.503288240401278E-10
peri 7.495137709171737E-13 -5.330188872398854E-12 3.722221101695995E-8 -4.905337460206063E-8 5.215119315952157E-8 3.502289812484704E-10
i -5.599085813454677E-17 3.314288434522233E-16 -6.021298875328365E-13 -3.503288240401278E-10 3.502289812484704E-10 2.737958923744909E-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 11.14   n/a E2021B10  
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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