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43747 (1981 EX31)
Classification: Main-belt Asteroid          SPK-ID: 2043747
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299171251638397 3.6826e-08  
a 2.817497765741662 1.4411e-08 au
q 2.451456555860963 1.0463e-07 au
i 5.549165312375268 4.1776e-06 deg
node 176.5727809198292 3.8006e-05 deg
peri 205.7085416268757 4.0729e-05 deg
M 304.0302103910821 1.6428e-05 deg
tp 2459469.062252616862
(2021-Sep-11.56225262)
7.9803e-05 TDB
period 1727.403508528921
4.73
1.3253e-05
3.628e-08
d
yr
n .2084052731296006 1.5989e-09 deg/d
Q 3.183538975622359 1.6283e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1678  
   data-arc span      14438 days (39.53 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-08-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48672  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:22:06  

Additional Information
 Earth MOID = 1.45423 au 
 Jupiter MOID = 2.27607 au 
 T_jup = 3.299 
[ 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 13.78   n/a E2021B10  
diameter diameter 5.552 km 0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.219   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

43747 (1981 EX31)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020822/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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