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39497 (1981 EB18)
Classification: Main-belt Asteroid          SPK-ID: 2039497
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1490058558044833 3.0811e-08  
a 2.58000050425956 1.1858e-08 au
q 2.195565321146365 7.7469e-08 au
i 4.015924638021097 5.1358e-06 deg
node 174.78662269 5.3595e-05 deg
peri 59.54628778770039 5.7423e-05 deg
M 25.84814705268698 1.9979e-05 deg
tp 2458491.818649072590
(2019-Jan-08.31864907)
8.3779e-05 TDB
period 1513.659228807285
4.14
1.0435e-05
2.857e-08
d
yr
n .2378342450854467 1.6397e-09 deg/d
Q 2.964435687372754 1.3625e-08 au
  Orbit Determination Parameters
   # obs. used (total)      895  
   data-arc span      14087 days (38.57 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-08-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54989  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:00:05  

Additional Information
 Earth MOID = 1.1878 au 
 Jupiter MOID = 2.03466 au 
 T_jup = 3.406 
[ 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 15.4   n/a MPO436046  
diameter diameter 2.040 km 0.347 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.353   0.223 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39497 (1981 EB18)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EB18 = 1998 KY41 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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