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13990 (1993 EK)
Classification: Main-belt Asteroid          SPK-ID: 2013990
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1787909404696252 2.9198e-08  
a 2.283610694212239 6.5279e-09 au
q 1.875321790527539 6.8082e-08 au
i 6.925353758929781 4.2202e-06 deg
node 338.9584041625715 2.8347e-05 deg
peri 125.9523690792235 3.3105e-05 deg
M 11.82112183545172 1.38e-05 deg
tp 2458959.110734274403
(2020-Apr-19.61073427)
4.8352e-05 TDB
period 1260.467142511734
3.45
5.4047e-06
1.48e-08
d
yr
n .2856083969651344 1.2247e-09 deg/d
Q 2.691899597896939 7.695e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1635  
   data-arc span      11500 days (31.49 yr)  
   first obs. used      1988-11-09  
   last obs. used      2020-05-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48692  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:42:48  

Additional Information
 Earth MOID = .901549 au 
 Jupiter MOID = 2.44645 au 
 T_jup = 3.573 
[ 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 15.0   n/a MPO452367  
diameter diameter 2.747 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.234   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13990 (1993 EK)          Discovered 1993-Mar-02 by Urata, T. at Oohira
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 EK = 1998 QT56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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