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39499 (1981 EJ29)
Classification: Main-belt Asteroid          SPK-ID: 2039499
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04480547458704665 4.4493e-08  
a 3.015529116894474 2.23e-08 au
q 2.880416903680959 1.3758e-07 au
i 9.686891279029492 6.5686e-06 deg
node 197.2711990012192 2.8109e-05 deg
peri 287.8943708530173 7.7113e-05 deg
M 221.9803438457949 7.1226e-05 deg
tp 2459733.800796227535
(2022-Jun-03.30079623)
0.00037857 TDB
period 1912.686163679228
5.24
2.1217e-05
5.809e-08
d
yr
n .1882169729860475 2.0878e-09 deg/d
Q 3.150641330107989 2.3299e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1009  
   data-arc span      14476 days (39.63 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54275  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 17:36:48  

Additional Information
 Earth MOID = 1.91281 au 
 Jupiter MOID = 1.8915 au 
 T_jup = 3.225 
[ 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 14.0   n/a MPO347804  
diameter diameter 5.596 km 1.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.170   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

39499 (1981 EJ29)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EJ29 = 1992 HK7 = 1994 TN17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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