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43743 (1981 EK16)
Classification: Main-belt Asteroid          SPK-ID: 2043743
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06282290135823757 3.8254e-08  
a 2.348369953404139 1.1368e-08 au
q 2.200838539468782 9.0161e-08 au
i 6.593100535586731 5.0337e-06 deg
node 339.8847957017298 3.5708e-05 deg
peri 257.2236583029205 5.4833e-05 deg
M 20.69019262725955 4.3382e-05 deg
tp 2459320.954215973355
(2021-Apr-16.45421597)
0.00015825 TDB
period 1314.462496292105
3.60
9.5449e-06
2.613e-08
d
yr
n .2738762049244494 1.9887e-09 deg/d
Q 2.495901367339496 1.2083e-08 au
  Orbit Determination Parameters
   # obs. used (total)      756  
   data-arc span      14752 days (40.39 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55841  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:19:52  

Additional Information
 Earth MOID = 1.20113 au 
 Jupiter MOID = 2.51301 au 
 T_jup = 3.548 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457060.5 (2015-Feb-07.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06338336786653598 3.8135e-08  
q 2.199928254617335 8.9977e-08 au
tp 2456691.977632499668
(2014-Feb-03.47763250)
0.00015331 TDB
node 339.9293148841172 3.5678e-05 deg
peri 257.3334998893238 5.4624e-05 deg
i 6.59618825759128 5.0352e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      756  
   data-arc span      14752 days (40.39 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55841  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:19:52  

Additional Information
 Jupiter MOID = 2.51301 au 
 T_jup = 3.548 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.454281560612112E-15 -3.406912447918204E-15 -9.34897306542265E-13 5.417998365982993E-15 -2.330327474478155E-13 6.812760468951322E-16
q -3.406912447918204E-15 8.095830799602073E-15 2.44083673540137E-12 -1.314654016292456E-14 6.197975208738972E-13 -1.275520975026957E-15
tp -9.34897306542265E-13 2.44083673540137E-12 2.35047535056792E-8 -1.714210043263398E-12 6.354077610566686E-9 4.247386684373239E-12
node 5.417998365982993E-15 -1.314654016292456E-14 -1.714210043263398E-12 1.272952088480638E-9 -1.264278555100452E-9 1.803085668822446E-12
peri -2.330327474478155E-13 6.197975208738972E-13 6.354077610566686E-9 -1.264278555100452E-9 2.983796403616945E-9 -5.466998304700514E-13
i 6.812760468951322E-16 -1.275520975026957E-15 4.247386684373239E-12 1.803085668822446E-12 -5.466998304700514E-13 2.53528592387919E-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 15.90   n/a E2021B10  
diameter diameter 1.852 km 0.393 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.270   0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

43743 (1981 EK16)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EK16 = 2000 QD111 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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