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5638 Deikoon (1988 TA3)
Classification: Jupiter Trojan          SPK-ID: 2005638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1072211015037918 2.6733e-08  
a 5.240875461592591 6.3125e-08 au
q 4.67894302175644 1.7118e-07 au
i 10.91462892976826 1.9176e-07 deg
node 156.0299778168597 3.9068e-06 deg
peri 92.65216038352594 1.3091e-05 deg
M 341.6173128043966 1.5771e-05 deg
tp 2459424.274545072711
(2021-Jul-28.77454507)
0.00019299 TDB
period 4382.321005029326
12.00
7.9175e-05
2.168e-07
d
yr
n .08214824965739607 1.4842e-09 deg/d
Q 5.802807901428742 6.9893e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2098  
   data-arc span      11889 days (32.55 yr)  
   first obs. used      1988-08-18  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44522  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:47:07  

Additional Information
 Earth MOID = 3.68679 au 
 Jupiter MOID = .180607 au 
 T_jup = 2.952 
[ 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 10.54   n/a E2021B10  
diameter diameter 41.455 km 0.482 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 19.40 h n/a LCDB (Rev. 2020-October); 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:
[Molnar, L.A.; Haegert, M.J.; Hoogenboom, K.M. (2008) Minor Planet Bull. 35, 82-84.]
geometric albedo albedo 0.071   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

5638 Deikoon (1988 TA3)          Discovered 1988-Oct-10 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1988 TA3 = 1988 RJ1 = 1989 TO2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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