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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2318421928722842 4.4471e-08  
a 2.558600851858415 1.6682e-08 au
q 1.965409219678665 1.0947e-07 au
i 12.93468603522013 6.2046e-06 deg
node 136.1821245913443 4.4191e-05 deg
peri 329.0421448022918 5.0272e-05 deg
M 89.80199631858967 2.6275e-05 deg
tp 2457227.605714855284
(2015-Jul-24.10571486)
0.00010798 JED
period 1494.865906720481
4.09
1.4619e-05
4.002e-08
d
yr
n .240824276198651 2.3552e-09 deg/d
Q 3.151792484038164 2.0549e-08 au
  Orbit Determination Parameters
   # obs. used (total)      632  
   data-arc span      10672 days (29.22 yr)  
   first obs. used      1987-01-26  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54177  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:35:55  

Additional Information
 Earth MOID = .991299 au 
 Jupiter MOID = 2.01921 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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