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129446 (1981 EB30)
Classification: Main-belt Asteroid          SPK-ID: 2129446
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 .1459413021635028 8.4766e-08  
a 2.532224072455262 2.3419e-08 au
q 2.162667993951374 2.083e-07 au
i 15.43773502752363 6.8566e-06 deg
node 344.7184359838236 2.2401e-05 deg
peri 329.6692684668243 5.2603e-05 deg
M 136.6721682489105 5.7695e-05 deg
tp 2458441.734980454187
(2018-Nov-19.23498045)
0.00023573 TDB
period 1471.809583573328
4.03
2.0418e-05
5.59e-08
d
yr
n .2445968581927393 3.3932e-09 deg/d
Q 2.901780150959151 2.6837e-08 au
  Orbit Determination Parameters
   # obs. used (total)      739  
   data-arc span      14312 days (39.18 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50047  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 21:44:24  

Additional Information
 Earth MOID = 1.1629 au 
 Jupiter MOID = 2.47694 au 
 T_jup = 3.385 
[ 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 14.6   n/a MPO359645  
diameter diameter 4.698 km 0.342 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.153   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129446 (1981 EB30)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1981 EB30 = 2001 DK59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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