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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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04919672514502508 6.1444e-08  
a 5.176477025123535 1.0163e-07 au
q 4.921811307698996 3.788e-07 au
i 25.16004059633674 5.5212e-06 deg
node 144.2858727539572 1.0972e-05 deg
peri 256.703349283755 5.9476e-05 deg
M 307.0705780217002 5.8456e-05 deg
tp 2459232.976674571679
(2021-Jan-18.47667457)
0.00069497 TDB
period 4301.79651195047
11.78
0.00012669
3.469e-07
d
yr
n .08368596678153264 2.4646e-09 deg/d
Q 5.431142742548076 1.0663e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1612  
   data-arc span      23272 days (63.72 yr)  
   first obs. used      1956-03-15  
   last obs. used      2019-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46316  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:56:44  

Additional Information
 Earth MOID = 4.012 au 
 Jupiter MOID = .0677228 au 
 T_jup = 2.809 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457137.5 (2015-Apr-25.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0494327864050222 6.1313e-08  
q 4.911500539983385 3.7802e-07 au
tp 2459251.867427570160
(2021-Feb-06.36742757)
0.00069484 TDB
node 144.2915753558418 1.0973e-05 deg
peri 258.5181656104913 5.9421e-05 deg
i 25.16809566370924 5.5237e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1612  
   data-arc span      23272 days (63.72 yr)  
   first obs. used      1956-03-15  
   last obs. used      2019-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46316  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:56:44  

Additional Information
 Jupiter MOID = .0677228 au 
 T_jup = 2.809 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.759342910371172E-15 -2.26405719735301E-14 -8.073942641906095E-12 6.036632822731304E-15 -3.469942285074933E-13 4.385525766995334E-15
q -2.26405719735301E-14 1.42896012537047E-13 3.140088661610582E-11 -3.566251985140571E-14 3.181149147126732E-13 -2.577309078287697E-14
tp -8.073942641906095E-12 3.140088661610582E-11 4.828002399133259E-7 -1.58152867634083E-12 4.036197174035972E-8 2.637884492763316E-11
node 6.036632822731304E-15 -3.566251985140571E-14 -1.58152867634083E-12 1.204092181515293E-10 -1.084746972643916E-10 7.675135276553628E-12
peri -3.469942285074933E-13 3.181149147126732E-13 4.036197174035972E-8 -1.084746972643916E-10 3.530860589626781E-9 -4.449666289099826E-12
i 4.385525766995334E-15 -2.577309078287697E-14 2.637884492763316E-11 7.675135276553628E-12 -4.449666289099826E-12 3.051163785875432E-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-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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