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39485 (1981 EO3)
Classification: Main-belt Asteroid          SPK-ID: 2039485
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2056888866365968 5.7823e-08  
a 2.598423371158641 1.3606e-08 au
q 2.063956560934507 1.4956e-07 au
i 15.19412408360244 6.5825e-06 deg
node 324.3186865524197 1.8212e-05 deg
peri 343.0961176856937 2.3655e-05 deg
M 17.49960797355558 1.9158e-05 deg
tp 2458926.131483806277
(2020-Mar-17.63148381)
8.1077e-05 TDB
period 1529.900890934109
4.19
1.2016e-05
3.29e-08
d
yr
n .2353093603208475 1.8482e-09 deg/d
Q 3.132890181382774 1.6404e-08 au
  Orbit Determination Parameters
   # obs. used (total)      993  
   data-arc span      14428 days (39.50 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50105  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 03:34:22  

Additional Information
 Earth MOID = 1.0541 au 
 Jupiter MOID = 2.18294 au 
 T_jup = 3.337 
[ 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 14.4   n/a MPO474252  
diameter diameter 6.464 km 0.351 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.097   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39485 (1981 EO3)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EO3 = 1999 RO205 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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