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37545 (1981 EA18)
Classification: Main-belt Asteroid          SPK-ID: 2037545
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05384411280426651 3.9822e-08  
a 3.045776164967443 1.9648e-08 au
q 2.88177904956439 1.1663e-07 au
i 11.47909732336707 4.8157e-06 deg
node 170.3827857466842 2.26e-05 deg
peri 327.5657624763539 5.2864e-05 deg
M 170.5711947929158 4.7742e-05 deg
tp 2458080.583108881478
(2017-Nov-23.08310888)
0.00025732 TDB
period 1941.535798026913
5.32
1.8787e-05
5.144e-08
d
yr
n .1854202226741583 1.7941e-09 deg/d
Q 3.209773280370496 2.0705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      810  
   data-arc span      14055 days (38.48 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55315  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 04:33:44  

Additional Information
 Earth MOID = 1.89991 au 
 Jupiter MOID = 1.7918 au 
 T_jup = 3.206 
[ 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 14.5   n/a MPO263659  
diameter diameter 3.965 km 0.965 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.214   0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

37545 (1981 EA18)          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 EA18 = 1999 RG125 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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