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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1787909421166456 2.9232e-08  
a 2.283610694646069 6.5342e-09 au
q 1.875321787122651 6.8148e-08 au
i 6.925353976660642 4.2538e-06 deg
node 338.9584047334487 2.8416e-05 deg
peri 125.9523703026683 3.3181e-05 deg
M 11.82111993781994 1.3853e-05 deg
tp 2458959.110740906782
(2020-Apr-19.61074091)
4.8535e-05 TDB
period 1260.467142870921
3.45
5.4099e-06
1.481e-08
d
yr
n .2856083968837465 1.2258e-09 deg/d
Q 2.691899602169488 7.7024e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1594  
   data-arc span      11410 days (31.24 yr)  
   first obs. used      1988-11-09  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48751  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:49:13  

Additional Information
 Earth MOID = .901549 au 
 Jupiter MOID = 2.44645 au 
 T_jup = 3.573 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456780.5 (2014-May-03.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .17804778279184 2.9263e-08  
q 1.876937547620432 6.8162e-08 au
tp 2456437.754968725326
(2013-May-25.25496873)
5.2142e-05 TDB
node 339.0406879642999 2.8393e-05 deg
peri 125.8427994457786 3.3224e-05 deg
i 6.92792837792492 4.2556e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1594  
   data-arc span      11410 days (31.24 yr)  
   first obs. used      1988-11-09  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48751  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:49:13  

Additional Information
 Jupiter MOID = 2.44645 au 
 T_jup = 3.573 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.563252344977026E-16 -1.988717081422524E-15 5.07779724208703E-13 -2.052340095363917E-15 1.834206724439372E-13 -1.913164086948411E-16
q -1.988717081422524E-15 4.646012003701371E-15 -1.266130014638766E-12 5.417857780701031E-15 -4.5097914463759E-13 4.969006086461294E-16
tp 5.07779724208703E-13 -1.266130014638766E-12 2.718770143992324E-9 -1.373119632188398E-11 9.070004591572211E-10 5.463358004800948E-12
node -2.052340095363917E-15 5.417857780701031E-15 -1.373119632188398E-11 8.061519215505441E-10 -8.043262884428366E-10 3.334987063837241E-11
peri 1.834206724439372E-13 -4.5097914463759E-13 9.070004591572211E-10 -8.043262884428366E-10 1.103865540618753E-9 -3.131745717362144E-11
i -1.913164086948411E-16 4.969006086461294E-16 5.463358004800948E-12 3.334987063837241E-11 -3.131745717362144E-11 1.810974739891822E-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 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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