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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1213107871788385 6.1217e-08  
a 2.556754876783555 2.1807e-08 AU
q 2.246592930057608 1.4927e-07 AU
i 13.0144029428345 8.6224e-06 deg
node 149.1982161365297 3.0656e-05 deg
peri 304.9129655289074 5.6721e-05 deg
M 212.3360064556528 4.6138e-05 deg
tp 2457612.997295299181
(2016-Aug-12.49729530)
0.0001936 JED
period 1493.248428510663
4.09
1.9105e-05
5.231e-08
d
yr
n .2410851356857324 3.0844e-09 deg/d
Q 2.866916823509503 2.4453e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      752  
   data-arc span      21794 days (59.67 yr)  
   first obs. used      1954-11-24  
   last obs. used      2014-07-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48213  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:23:25  

Additional Information
 Earth MOID = 1.28915 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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