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37550 (1981 EE31)
Classification: Main-belt Asteroid          SPK-ID: 2037550
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2706991204570596 3.2675e-08  
a 2.324730747323953 7.8691e-09 au
q 1.695428178723876 7.6456e-08 au
i 21.39834595366041 4.8682e-06 deg
node 177.9578053295071 9.6599e-06 deg
peri 106.5542048630029 1.2876e-05 deg
M 306.6482471393842 8.7015e-06 deg
tp 2459192.368468191501
(2020-Dec-08.86846819)
3.164e-05 TDB
period 1294.665026834195
3.54
6.5736e-06
1.8e-08
d
yr
n .2780642038970475 1.4118e-09 deg/d
Q 2.95403331592403 9.9993e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1083  
   data-arc span      14320 days (39.21 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5483  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:26:14  

Additional Information
 Earth MOID = .803466 au 
 Jupiter MOID = 2.61179 au 
 T_jup = 3.436 
[ 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 15.3   n/a MPO351094  
diameter diameter 2.192 km 0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.296   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

37550 (1981 EE31)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020328/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EE31 = 1999 JK6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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