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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1787542157162142 2.9166e-08  
a 2.283336119061503 6.5458e-09 au
q 1.875180161882159 6.8009e-08 au
i 6.925701970968007 4.2202e-06 deg
node 338.9580917940027 2.8343e-05 deg
peri 125.9115546745348 3.3101e-05 deg
M 68.98311570166742 1.3759e-05 deg
tp 2458959.013141438820
(2020-Apr-19.51314144)
4.8351e-05 TDB
period 1260.239816624049
3.45
5.4192e-06
1.484e-08
d
yr
n .2856599158756734 1.2284e-09 deg/d
Q 2.691492076240846 7.7159e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1641  
   data-arc span      11720 days (32.09 yr)  
   first obs. used      1988-11-09  
   last obs. used      2020-12-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48684  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:14:57  

Additional Information
 Earth MOID = .901287 au 
 Jupiter MOID = 2.44668 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 15.06   n/a E2021B10  
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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