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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02138173394265076 5.0425e-08  
a 5.141942797243115 9.8131e-08 au
q 5.031999144404134 3.2135e-07 au
i 26.41953795787068 5.2809e-06 deg
node 219.3248421672308 1.0275e-05 deg
peri 215.2632835432883 0.00014531 deg
M 293.7036386890633 0.00014897 deg
tp 2460180.789643483937
(2023-Aug-24.28964348)
0.0017747 TDB
period 4258.820032821919
11.66
0.00012192
3.338e-07
d
yr
n .08453045614173602 2.4198e-09 deg/d
Q 5.251886450082097 1.0023e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1456  
   data-arc span      11719 days (32.08 yr)  
   first obs. used      1989-01-08  
   last obs. used      2021-02-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49331  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:39:01  

Additional Information
 Earth MOID = 4.05547 au 
 Jupiter MOID = .0675996 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 11.45   n/a E2021B10  
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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