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243554 (1981 EL30)
Classification: Main-belt Asteroid          SPK-ID: 2243554
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1408879120784324 5.4579e-08  
a 3.153614833620332 3.9353e-08 au
q 2.709308624211991 1.7894e-07 au
i 10.29966424565257 6.475e-06 deg
node 305.5491908529004 3.6229e-05 deg
peri 277.1168962735721 4.389e-05 deg
M 337.8667733056117 2.3201e-05 deg
tp 2459126.263215518154
(2020-Oct-03.76321552)
0.00013188 TDB
period 2045.5561320399
5.60
3.8289e-05
1.048e-07
d
yr
n .1759912594727945 3.2942e-09 deg/d
Q 3.597921043028674 4.4898e-08 au
  Orbit Determination Parameters
   # obs. used (total)      265  
   data-arc span      14300 days (39.15 yr)  
   first obs. used      1981-03-02  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58665  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 12:49:12  

Additional Information
 Earth MOID = 1.72557 au 
 Jupiter MOID = 1.61773 au 
 T_jup = 3.167 
[ 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 15.2   n/a MPO433596  
diameter diameter 5.604 km 0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

243554 (1981 EL30)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28

[ show close-approach data ]
Alternate Designations
 1981 EL30 = 2003 ET7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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