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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04919672505521878 6.1449e-08  
a 5.176477025474268 1.0168e-07 au
q 4.921811308497354 3.7885e-07 au
i 25.16004057870521 5.5302e-06 deg
node 144.2858727900918 1.0994e-05 deg
peri 256.7033496611547 5.9602e-05 deg
M 307.0705775672761 5.8611e-05 deg
tp 2459232.976680066071
(2021-Jan-18.47668007)
0.00069688 TDB
period 4301.796512387672
11.78
0.00012674
3.47e-07
d
yr
n .08368596677302743 2.4657e-09 deg/d
Q 5.431142742451183 1.0668e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1596  
   data-arc span      23268 days (63.70 yr)  
   first obs. used      1956-03-15  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .465  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 21:15:24  

Additional Information
 Earth MOID = 4.012 au 
 Jupiter MOID = .0677228 au 
 T_jup = 2.809 
[ 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 10.1   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-January); 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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