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43746 (1981 EH31)
Classification: Main-belt Asteroid          SPK-ID: 2043746
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .206813501188685 3.9751e-08  
a 2.471063670392135 9.5423e-09 au
q 1.960014341058175 9.7475e-08 au
i 8.620851667196398 5.9438e-06 deg
node 169.7017879913136 2.0831e-05 deg
peri 251.6132651626783 2.5491e-05 deg
M 178.4290854473676 1.3502e-05 deg
tp 2458497.286047185647
(2019-Jan-13.78604719)
5.3023e-05 TDB
period 1418.81029305529
3.88
8.2183e-06
2.25e-08
d
yr
n .2537337103925077 1.4697e-09 deg/d
Q 2.982112999726095 1.1516e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1258  
   data-arc span      14905 days (40.81 yr)  
   first obs. used      1979-09-21  
   last obs. used      2020-07-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53133  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:22:06  

Additional Information
 Earth MOID = .991371 au 
 Jupiter MOID = 2.41786 au 
 T_jup = 3.439 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.33   n/a E2021B10  
diameter diameter 2.342 km 0.304 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.322   0.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

43746 (1981 EH31)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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