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5285 Krethon (1989 EO11)
Classification: Jupiter Trojan          SPK-ID: 2005285
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04979303775220689 6.1444e-08  
a 5.179587259895574 1.0145e-07 au
q 4.921679875922744 3.7868e-07 au
i 25.15561933463371 5.4893e-06 deg
node 144.2780442194491 1.0917e-05 deg
peri 256.5284082386544 5.8387e-05 deg
M 340.7396032273682 5.7042e-05 deg
tp 2459230.858311532644
(2021-Jan-16.35831153)
0.00068092 TDB
period 4305.674131780625
11.79
0.0001265
3.463e-07
d
yr
n .08361060056607697 2.4564e-09 deg/d
Q 5.437494643868404 1.065e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1674  
   data-arc span      23325 days (63.86 yr)  
   first obs. used      1956-03-15  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45423  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:34:15  

Additional Information
 Earth MOID = 4.0127 au 
 Jupiter MOID = .0703978 au 
 T_jup = 2.809 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457170.5 (2015-May-28.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04936870937054156 6.1324e-08  
q 4.912141226566413 3.7794e-07 au
tp 2459251.600814846177
(2021-Feb-06.10081485)
0.00068966 TDB
node 144.2910017135727 1.0917e-05 deg
peri 258.4828547914867 5.9089e-05 deg
i 25.16806730487766 5.4928e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1674  
   data-arc span      23325 days (63.86 yr)  
   first obs. used      1956-03-15  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45423  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:34:15  

Additional Information
 Jupiter MOID = .0703978 au 
 T_jup = 2.809 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.760686054801367E-15 -2.264106800005825E-14 -7.950161021165371E-12 6.657495919974022E-15 -3.380942205103795E-13 4.092569466042198E-15
q -2.264106800005825E-14 1.428414155642298E-13 3.023053920933285E-11 -3.950930085276893E-14 2.325430135782351E-13 -2.402920468647204E-14
tp -7.950161021165371E-12 3.023053920933285E-11 4.75637277652426E-7 -5.55030817788685E-12 3.983740836955428E-8 2.765131046299994E-11
node 6.657495919974022E-15 -3.950930085276893E-14 -5.55030817788685E-12 1.191793958733891E-10 -1.076323471117556E-10 8.33808694962761E-12
peri -3.380942205103795E-13 2.325430135782351E-13 3.983740836955428E-8 -1.076323471117556E-10 3.491476331795561E-9 -4.965554733509773E-12
i 4.092569466042198E-15 -2.402920468647204E-14 2.765131046299994E-11 8.33808694962761E-12 -4.965554733509773E-12 3.017097222875051E-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 10.1   n/a MPO384801  
diameter diameter 49.606 km 0.749 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 12.04 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[French, L.M.; Stephens, R.D.; Coley, D.R.; Wasserman, L.H.; et al. (2013) Minor Planet Bull. 40, 198-203.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 15-22.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.079   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

5285 Krethon (1989 EO11)          Discovered 1989-Mar-09 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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