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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1410701461132503 6.1851e-08  
a 3.154994354797852 5.7161e-08 au
q 2.709918840180039 1.877e-07 au
i 10.29834351554804 7.3895e-06 deg
node 305.5465930467304 3.8614e-05 deg
peri 276.9651292774354 4.6335e-05 deg
M 267.6493380061946 2.7707e-05 deg
tp 2459125.590086172174
(2020-Oct-03.09008617)
0.00016338 TDB
period 2046.898494725057
5.60
5.5627e-05
1.523e-07
d
yr
n .1758758438328696 4.7797e-09 deg/d
Q 3.600069869415666 6.5225e-08 au
  Orbit Determination Parameters
   # obs. used (total)      221  
   data-arc span      13822 days (37.84 yr)  
   first obs. used      1981-03-02  
   last obs. used      2019-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61024  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:21:09  

Additional Information
 Earth MOID = 1.72631 au 
 Jupiter MOID = 1.61641 au 
 T_jup = 3.166 
[ 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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