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JPL Small-Body Database Browser
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10664 Phemios (5187 T-2)
Classification: Jupiter Trojan          SPK-ID: 2010664
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03034716623108096 4.5568e-08  
a 5.190222978699557 9.6985e-08 au
q 5.032714419188586 2.6554e-07 au
i 8.576494455324941 5.3456e-06 deg
node 240.1226673329022 4.1833e-05 deg
peri 233.6171060418146 0.00012964 deg
M 264.6828604309556 0.00012647 deg
tp 2460144.025756808356
(2023-Jul-18.52575681)
0.0015319 TDB
period 4318.942787333745
11.82
0.00012106
3.314e-07
d
yr
n .08335373208827392 2.3363e-09 deg/d
Q 5.347731538210529 9.9929e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1104  
   data-arc span      24008 days (65.73 yr)  
   first obs. used      1954-03-07  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52741  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:06:42  

Additional Information
 Earth MOID = 4.0577 au 
 Jupiter MOID = .0351411 au 
 T_jup = 2.977 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.3   n/a MPO337348  
diameter diameter 30.963 km 0.603 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.067   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

10664 Phemios           Discovered 1973 Sept. 25 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Phemios was a singer with Telemachos, forced to play for Penelope's suitors, spared by Odysseus for friendly deeds and because a singer is sacred.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000124/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 5187 T-2 = 1989 ER2 = 1990 EM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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