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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04660503595065127 3.9527e-08  
a 5.30510079531767 6.8577e-08 au
q 5.057856382030061 2.1045e-07 au
i .9458977514767286 5.2182e-06 deg
node 208.1001199513745 0.0002205 deg
peri 115.0808842352275 0.00022685 deg
M 62.35685047846084 5.1427e-05 deg
tp 2458427.426907571574
(2018-Nov-04.92690757)
0.00064264 TDB
period 4463.123315863511
12.22
8.6539e-05
2.369e-07
d
yr
n .08066100228968204 1.564e-09 deg/d
Q 5.552345208605279 7.1773e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2101  
   data-arc span      22078 days (60.45 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48097  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:30:40  

Additional Information
 Earth MOID = 4.04361 au 
 Jupiter MOID = .115228 au 
 T_jup = 2.998 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457087.5 (2015-Mar-06.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04489715546787839 3.9421e-08  
q 5.054288997152963 2.0832e-07 au
tp 2458420.526227536890
(2018-Oct-29.02622754)
0.00066837 TDB
node 208.1095323140871 0.00022046 deg
peri 114.4072415719812 0.00022735 deg
i .9462873506132194 5.2231e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2101  
   data-arc span      22078 days (60.45 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48097  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:30:40  

Additional Information
 Jupiter MOID = .115228 au 
 T_jup = 2.998 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.554000007698846E-15 -7.804008142772193E-15 9.301217910683464E-12 -6.349336109824292E-16 7.404660964006352E-13 -5.628080515464474E-17
q -7.804008142772193E-15 4.339682080738472E-14 -6.404090747521043E-11 3.929726977439346E-15 -5.273241275077855E-12 3.337151565973965E-16
tp 9.301217910683464E-12 -6.404090747521043E-11 4.467209210136298E-7 -2.811092625585777E-11 3.713186536646438E-8 -6.283825535206177E-13
node -6.349336109824292E-16 3.929726977439346E-15 -2.811092625585777E-11 4.86007914461291E-8 -4.859637147963948E-8 -3.452843851015239E-10
peri 7.404660964006352E-13 -5.273241275077855E-12 3.713186536646438E-8 -4.859637147963948E-8 5.168608216353345E-8 3.451830799186671E-10
i -5.628080515464474E-17 3.337151565973965E-16 -6.283825535206177E-13 -3.452843851015239E-10 3.451830799186671E-10 2.728087660886916E-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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