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19943 (1981 EB31)
Classification: Main-belt Asteroid          SPK-ID: 2019943
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1022623275507001 4.7872e-08  
a 3.025198724112722 1.8143e-08 au
q 2.715834861281547 1.4433e-07 au
i 6.432817483722875 5.3925e-06 deg
node 165.0983739025316 3.0551e-05 deg
peri 7.696598749516571 3.5487e-05 deg
M 198.7165536372262 2.0477e-05 deg
tp 2460061.526630714915
(2023-Apr-27.02663072)		 0.0001139 TDB
period 1921.893374972636
5.26		 1.7289e-05
4.733e-08		 d
yr
n .1873152822565537 1.685e-09 deg/d
Q 3.334562586943898 1.9998e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1030  
   data-arc span      14579 days (39.92 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-01-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54025  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:09:58  

Additional Information
 Earth MOID = 1.72104 au 
 Jupiter MOID = 1.62804 au 
 T_jup = 3.227 
[ show covariance matrix ]

[ 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 14.38   n/a E2021B10  
diameter diameter 7.160 km 0.404 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.060   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19943 (1981 EB31)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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