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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2313896521404264 5.692e-08  
a 2.558592289114768 2.0812e-08 AU
q 1.966560509367325 1.474e-07 AU
i 12.93724856730955 6.3399e-06 deg
node 136.1950557611185 5.016e-05 deg
peri 329.1113953796249 5.776e-05 deg
M 305.2726804337782 3.2462e-05 deg
tp 2457227.748870838357
(2015-Jul-24.24887084)
0.00013623 JED
period 1494.858402535434
4.09
1.8239e-05
4.994e-08
d
yr
n .2408254851358516 2.9383e-09 deg/d
Q 3.150624068862212 2.5627e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      449  
   data-arc span      10111 days (27.68 yr)  
   first obs. used      1987-01-26  
   last obs. used      2014-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56717  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:43:11  

Additional Information
 Earth MOID = .993855 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 14.9 mag n/a MPO309318  

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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