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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1019791600650473 4.8145e-08  
a 3.025991347718531 2.0368e-08 au
q 2.717403291714095 1.4532e-07 au
i 6.431811041172044 5.4572e-06 deg
node 165.0973644629059 3.7525e-05 deg
peri 7.797908928687263 4.2953e-05 deg
M 161.1383575812158 2.1526e-05 deg
tp 2458139.909828804268
(2018-Jan-21.40982880)		 0.00011243 TDB
period 1922.648749068414
5.26		 1.9412e-05
5.315e-08		 d
yr
n .1872416894528612 1.8905e-09 deg/d
Q 3.334579403722967 2.2446e-08 au
   Orbit Determination Parameters
   # obs. used (total)      866  
   data-arc span      13658 days (37.39 yr)  
   first obs. used      1981-02-09  
   last obs. used      2018-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55417  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 17:57:40  

Additional Information
 Earth MOID = 1.72297 au 
 Jupiter MOID = 1.62893 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 14.3   n/a MPO435884  
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

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