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129445 (1981 EA24)
Classification: Main-belt Asteroid          SPK-ID: 2129445
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1789260946621012 5.4569e-08  
a 2.885128775964616 3.2023e-08 au
q 2.368903951484019 1.6914e-07 au
i 7.351940217877034 9.0398e-06 deg
node 355.3434389972642 4.1933e-05 deg
peri 262.8968477027614 6.1023e-05 deg
M 300.5930346419016 5.5559e-05 deg
tp 2459295.880007983315
(2021-Mar-22.38000798)
0.0002792 TDB
period 1789.971971013961
4.90
2.9801e-05
8.159e-08
d
yr
n .2011204677110512 3.3485e-09 deg/d
Q 3.401353600445213 3.7753e-08 au
  Orbit Determination Parameters
   # obs. used (total)      318  
   data-arc span      14210 days (38.90 yr)  
   first obs. used      1981-03-07  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58841  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 07:04:25  

Additional Information
 Earth MOID = 1.36812 au 
 Jupiter MOID = 1.74813 au 
 T_jup = 3.257 
[ 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 15.5   n/a MPO426808  
diameter diameter 3.015 km 0.844 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.102   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129445 (1981 EA24)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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