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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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1213107872701705 6.1231e-08  
a 2.556754876810931 2.1811e-08 AU
q 2.246592929848149 1.493e-07 AU
i 13.01440286809562 8.6305e-06 deg
node 149.1982159332594 3.0673e-05 deg
peri 304.9129655544043 5.6806e-05 deg
M 212.3360065986998 4.6205e-05 deg
tp 2457612.997294715672
(2016-Aug-12.49729472)
0.00019387 JED
period 1493.248428534646
4.09
1.9108e-05
5.231e-08
d
yr
n .2410851356818604 3.085e-09 deg/d
Q 2.866916823773713 2.4457e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      747  
   data-arc span      21768 days (59.60 yr)  
   first obs. used      1954-11-24  
   last obs. used      2014-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48368  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:28:57  

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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