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12916 Eteoneus (1998 TL15)
Classification: Jupiter Trojan          SPK-ID: 2012916
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02072567131046541 5.1822e-08  
a 5.144425744198539 9.929e-08 au
q 5.037804067143184 3.2695e-07 au
i 26.41296452111643 5.4856e-06 deg
node 219.3414974314381 1.04e-05 deg
peri 213.70525399 0.00014846 deg
M 261.7017628673861 0.00015165 deg
tp 2460164.216011450519
(2023-Aug-07.71601145)
0.0018136 TDB
period 4261.905160689696
11.67
0.00012339
3.378e-07
d
yr
n .08446926583925717 2.4455e-09 deg/d
Q 5.251047421253894 1.0135e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1360  
   data-arc span      11613 days (31.79 yr)  
   first obs. used      1989-01-08  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49744  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:49:44  

Additional Information
 Earth MOID = 4.06021 au 
 Jupiter MOID = .0691006 au 
 T_jup = 2.792 
[ 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 11.4   n/a MPO416851  
diameter diameter 22.289 km 1.618 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.098   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

12916 Eteoneus           Discovered 1998 Oct. 13 by the OCA-DLR Asteroid Survey at Caussols.
Eteoneus, the son of Boethous, was King Menelaus of Sparta's weapon-carrier during the Trojan War. He helped Odysseus in his attempts to return home.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20081113/MPCPages.arcLast Updated: 2008-11-17

Alternate Designations
 1998 TL15 = 1986 TL7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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