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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1213996481778232 6.847e-08  
a 2.556579015637517 2.1236e-08 AU
q 2.246211222600317 1.6813e-07 AU
i 13.01372167278463 1.1013e-05 deg
node 149.201753697032 3.6992e-05 deg
peri 304.8758375606362 8.7929e-05 deg
M 164.160655718049 7.272e-05 deg
tp 2456119.646249473871
(2012-Jul-11.14624947)
0.00030181 JED
period 1493.094366109171
4.09
1.8604e-05
5.093e-08
d
yr
n .2411100116452236 3.0042e-09 deg/d
Q 2.866946808674717 2.3815e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      731  
   data-arc span      21394 days (58.57 yr)  
   first obs. used      1954-11-24  
   last obs. used      2013-06-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50542  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Dec-20 02:03:52  

Additional Information
 Earth MOID = 1.28854 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 13.0 mag n/a PDS3 (MPC 37034)  

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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