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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1787174678189407 2.7619e-08  
a 2.28306427118237 6.2309e-09 au
q 1.875040805768761 6.3982e-08 au
i 6.925778134902002 4.0643e-06 deg
node 338.9588504706425 2.8327e-05 deg
peri 125.8692150978808 3.2228e-05 deg
M 125.0282734434082 1.2766e-05 deg
tp 2458958.895916038630
(2020-Apr-19.39591604)
4.4796e-05 TDB
period 1260.014762160176
3.45
5.1582e-06
1.412e-08
d
yr
n .2857109383248925 1.1696e-09 deg/d
Q 2.691087736595978 7.3445e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1703  
   data-arc span      11909 days (32.61 yr)  
   first obs. used      1988-11-09  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48326  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:24:37  

Additional Information
 Earth MOID = .901598 au 
 Jupiter MOID = 2.44725 au 
 T_jup = 3.573 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456911.5 (2014-Sep-11.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1779954311062091 2.7664e-08  
q 1.877208012920358 6.4071e-08 au
tp 2456437.789243502539
(2013-May-25.28924350)
4.7322e-05 TDB
node 339.0371988223475 2.8304e-05 deg
peri 125.8697800299745 3.2252e-05 deg
i 6.927848199010123 4.0656e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1703  
   data-arc span      11909 days (32.61 yr)  
   first obs. used      1988-11-09  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48326  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:24:37  

Additional Information
 Jupiter MOID = 2.44725 au 
 T_jup = 3.573 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.65281616369498E-16 -1.766841827668117E-15 2.998346445061377E-13 -1.107280094677831E-15 1.101389295507972E-13 -3.750451063474185E-16
q -1.766841827668117E-15 4.105069564269715E-15 -7.591992033278834E-13 3.091120723662925E-15 -2.722295256265683E-13 9.540984622600714E-16
tp 2.998346445061377E-13 -7.591992033278834E-13 2.239409512663696E-9 -1.270305051520632E-11 7.392850444908372E-10 3.861903138918699E-12
node -1.107280094677831E-15 3.091120723662925E-15 -1.270305051520632E-11 8.011219381142031E-10 -7.989619858128458E-10 3.149343038599972E-11
peri 1.101389295507972E-13 -2.722295256265683E-13 7.392850444908372E-10 -7.989619858128458E-10 1.04017529856686E-9 -3.000958898641913E-11
i -3.750451063474185E-16 9.540984622600714E-16 3.861903138918699E-12 3.149343038599972E-11 -3.000958898641913E-11 1.652892906262947E-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 15.06   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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