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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1210518702769086 4.588e-08  
a 2.556010316524405 1.787e-08 au
q 2.246600487262052 1.1696e-07 au
i 13.01472591068292 8.2333e-06 deg
node 149.1959716213976 2.8965e-05 deg
peri 305.0377877780924 5.4975e-05 deg
M 356.8683435592948 4.611e-05 deg
tp 2457613.484162473543
(2016-Aug-12.98416247)
0.00019122 JED
period 1492.59619596809
4.09
1.5653e-05
4.286e-08
d
yr
n .2411904847221628 2.5294e-09 deg/d
Q 2.865420145786757 2.0033e-08 au
  Orbit Determination Parameters
   # obs. used (total)      905  
   data-arc span      22357 days (61.21 yr)  
   first obs. used      1954-11-24  
   last obs. used      2016-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48005  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:51:17  

Additional Information
 Earth MOID = 1.28766 au 
 Jupiter MOID = 2.30701 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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