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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 ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06282290131128886 3.8212e-08  
a 2.348369953487289 1.1308e-08 au
q 2.200838539656961 9.0006e-08 au
i 6.593100940931434 5.0159e-06 deg
node 339.88479651 3.5701e-05 deg
peri 257.2236580498615 5.4621e-05 deg
M 20.69019201272154 4.303e-05 deg
tp 2459320.954218213196
(2021-Apr-16.45421821)
0.00015697 TDB
period 1314.462496361919
3.60
9.4945e-06
2.599e-08
d
yr
n .2738762049099034 1.9782e-09 deg/d
Q 2.495901367317618 1.2019e-08 au
  Orbit Determination Parameters
   # obs. used (total)      763  
   data-arc span      14776 days (40.45 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-07-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55883  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:43:12  

Additional Information
 Earth MOID = 1.20113 au 
 Jupiter MOID = 2.51301 au 
 T_jup = 3.548 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457067.5 (2015-Feb-14.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06338693079860289 3.8095e-08  
q 2.19990998422775 8.9826e-08 au
tp 2456691.968219888627
(2014-Feb-03.46821989)
0.00015224 TDB
node 339.92932633802 3.5672e-05 deg
peri 257.329952904171 5.4411e-05 deg
i 6.596199979280776 5.0174e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      763  
   data-arc span      14776 days (40.45 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-07-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55883  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 16:43:12  

Additional Information
 Jupiter MOID = 2.51301 au 
 T_jup = 3.548 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.451224290152219E-15 -3.397802542364614E-15 -9.033896206048452E-13 5.299660594889648E-15 -2.246543001313785E-13 6.321856696151038E-16
q -3.397802542364614E-15 8.068675768033929E-15 2.346825546280621E-12 -1.283691334278131E-14 5.948364958028846E-13 -1.157315714124366E-15
tp -9.033896206048452E-13 2.346825546280621E-12 2.317659083786111E-8 -1.286975508680253E-12 6.267588884873111E-9 4.23807013559355E-12
node 5.299660594889648E-15 -1.283691334278131E-14 -1.286975508680253E-12 1.272494727446103E-9 -1.263715457519423E-9 1.523717306106377E-12
peri -2.246543001313785E-13 5.948364958028846E-13 6.267588884873111E-9 -1.263715457519423E-9 2.960557826999638E-9 -2.73818313756417E-13
i 6.321856696151038E-16 -1.157315714124366E-15 4.23807013559355E-12 1.523717306106377E-12 -2.73818313756417E-13 2.51741705218888E-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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