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13406 Sekora (1999 TA4)
Classification: Main-belt Asteroid          SPK-ID: 2013406
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1658528454374807 3.7616e-08  
a 2.741369896817515 1.4139e-08 au
q 2.286705899033677 1.0809e-07 au
i 12.4319887000716 4.4851e-06 deg
node 230.8934207876163 2.0346e-05 deg
peri 39.18425940887337 2.5765e-05 deg
M 306.4587831379673 1.6746e-05 deg
tp 2459247.067381290480
(2021-Feb-01.56738129)
7.7506e-05 TDB
period 1657.867759959667
4.54
1.2826e-05
3.512e-08
d
yr
n .2171463904990577 1.68e-09 deg/d
Q 3.196033894601352 1.6484e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1703  
   data-arc span      25838 days (70.74 yr)  
   first obs. used      1949-11-21  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47659  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:46:34  

Additional Information
 Earth MOID = 1.2855 au 
 Jupiter MOID = 1.9114 au 
 T_jup = 3.296 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457164.5 (2015-May-22.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1653754523478587 3.7675e-08  
q 2.289985169498125 1.0824e-07 au
tp 2457586.262838120899
(2016-Jul-16.76283812)
7.5856e-05 TDB
node 230.9418600809447 2.0354e-05 deg
peri 38.63991793326826 2.5773e-05 deg
i 12.42587809624341 4.4831e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1703  
   data-arc span      25838 days (70.74 yr)  
   first obs. used      1949-11-21  
   last obs. used      2020-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47659  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:46:34  

Additional Information
 Jupiter MOID = 1.9114 au 
 T_jup = 3.296 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.419406902177487E-15 -4.056825899725023E-15 -5.886472712434174E-13 2.423034507474974E-15 -6.636577677238255E-14 -8.676236254131723E-16
q -4.056825899725023E-15 1.171503731346559E-14 1.675814429880046E-12 -5.590989829171417E-15 1.787918147384775E-13 2.152257051726614E-15
tp -5.886472712434174E-13 1.675814429880046E-12 5.754206571072019E-9 -5.443640880265407E-12 1.217505952049787E-9 7.826844506606972E-12
node 2.423034507474974E-15 -5.590989829171417E-15 -5.443640880265407E-12 4.14266242460108E-10 -4.052753598813021E-10 -2.927765282816709E-11
peri -6.636577677238255E-14 1.787918147384775E-13 1.217505952049787E-9 -4.052753598813021E-10 6.642504656330013E-10 3.027257568417827E-11
i -8.676236254131723E-16 2.152257051726614E-15 7.826844506606972E-12 -2.927765282816709E-11 3.027257568417827E-11 2.009789466782392E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO435828  

13406 Sekora           Discovered 1999 Oct. 2 by L. Sarounova at Ondrejov.
Ondřej Sekora (1899-1967), Czech journalist, cartoonist, illustrator and writer, is known mainly for his work for children and creation of the character of Ferda Mravenec ("Ferda the Ant"). Sekora's popular stories about the life of insects and animals are based on his exceptional knowledge of nature.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1999 TA4 = 1981 UW5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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