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11509 Thersilochos (1990 VL6)
Classification: Jupiter Trojan          SPK-ID: 2011509
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 .1434063947538081 2.4274e-08  
a 5.176973044200442 7.7788e-08 au
q 4.43456200419401 1.5342e-07 au
i 18.5086415263618 9.4746e-07 deg
node 214.6990959176238 5.5802e-06 deg
peri 128.3329486728144 1.2336e-05 deg
M 266.5221307001867 1.4787e-05 deg
tp 2460317.668254565117
0.00019517 TDB
period 4302.414835253902
n .08367393981867279 1.8859e-09 deg/d
Q 5.919384084206873 8.8944e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1994  
   data-arc span      11478 days (31.43 yr)  
   first obs. used      1989-09-29  
   last obs. used      2021-03-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45541  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 22:40:59  

Additional Information
 Earth MOID = 3.46413 au 
 Jupiter MOID = .0794833 au 
 T_jup = 2.877 
[ 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 10.26   n/a E2021B10  
diameter diameter 49.960 km 0.755 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  
rotation period rot_per 17.367 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2015) Minor Planet Bull. 42, 216-224.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.065   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  

11509 Thersilochos           Discovered 1990 Nov. 15 by E. W. Elst at the European Southern Observatory.
Thersilochos was a Trojan warrior from the rich valleys of Paeonia. He showed up, together with Hector, at the battle for the dead body of Patrocles. He was later killed by Achilles.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1990 VL6 = 1989 SN7 = 1989 VM5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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