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21000 L'Encyclopedie (1987 BY1)
Classification: Main-belt Asteroid          SPK-ID: 2021000
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2313753988284655 6.0444e-08  
a 2.559015610469067 2.301e-08 AU
q 1.966922352988517 1.5402e-07 AU
i 12.93698290577306 6.3616e-06 deg
node 136.1941643838528 5.4253e-05 deg
peri 329.0720143546048 6.1164e-05 deg
M 257.1539722216106 3.217e-05 deg
tp 2457227.662236277788
(2015-Jul-24.16223628)
0.00013628 JED
period 1495.229406344818
4.09
2.0167e-05
5.521e-08
d
yr
n .240765730310269 3.2473e-09 deg/d
Q 3.151108867949616 2.8334e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      9656 days (26.44 yr)  
   first obs. used      1987-01-26  
   last obs. used      2013-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55747  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:52:43  

Additional Information
 Earth MOID = .993995 AU 
 T_jup = 3.363 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8 mag n/a MPO266066  

21000 L´Encyclopédie           Discovered 1987 Jan. 26 by E. W. Elst at the European Southern Observatory.
The Encyclopédie or Dictionnaire raisonné des sciences, des arts et des métiers (1751-1772), by Diderot and d´Alembert, may be considered the principal work of the Age of Enlightenment.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1987 BY1 = 2000 JS79 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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