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12687 de Valory (1987 YS1)
Classification: Main-belt Asteroid          SPK-ID: 2012687
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1211621343081438 4.6049e-08  
a 2.556386203347747 1.7982e-08 au
q 2.246648994834242 1.173e-07 au
i 13.01475855952631 8.2652e-06 deg
node 149.1976972213162 2.8966e-05 deg
peri 304.996915017416 5.4961e-05 deg
M 308.6735242259688 4.5948e-05 deg
tp 2457613.351673460860
(2016-Aug-12.85167346)
0.00019133 JED
period 1492.925459820471
4.09
1.5753e-05
4.313e-08
d
yr
n .2411372902993369 2.5444e-09 deg/d
Q 2.866123411861253 2.0161e-08 au
  Orbit Determination Parameters
   # obs. used (total)      895  
   data-arc span      22289 days (61.02 yr)  
   first obs. used      1954-11-24  
   last obs. used      2015-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47467  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:21:40  

Additional Information
 Earth MOID = 1.28905 au 
 Jupiter MOID = 2.30752 au 
 T_jup = 3.391 
[ 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 13.1 mag n/a MPO299054  

12687 de Valory           Discovered 1987 Dec. 17 by E. W. Elst and G. Pizarro at the European Southern Observatory.
Guy Louis Henri, Marquis de Valory (1692-1774), was a French aristocrat, well known from his friendship with Voltaire. He became an ambassador for the Prussian King Frederic II.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080618/MPCPages.arcLast Updated: 2008-06-20

[ show close-approach data ]
Alternate Designations
 1987 YS1 = 1989 GT6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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