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18643 van Rysselberghe (1998 EK12)
Classification: Main-belt Asteroid          SPK-ID: 2018643
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09525794239432603 8.8547e-08  
a 2.703362795589603 3.0138e-08 AU
q 2.445846018136365 2.454e-07 AU
i 10.38127241534088 1.1887e-05 deg
node 27.18359321302275 3.9944e-05 deg
peri 314.8456838727335 6.7621e-05 deg
M 332.720143360466 5.7031e-05 deg
tp 2456523.525321524822
(2013-Aug-19.02532152)		 0.00025791 JED
period 1623.509842231062
4.44		 2.7149e-05
7.433e-08		 d
yr
n .2217418032435703 3.7081e-09 deg/d
Q 2.960879573042842 3.3009e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      786  
   data-arc span      15890 days (43.50 yr)  
   first obs. used      1969-10-16  
   last obs. used      2013-04-18  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .51954  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 14:19:40  

Additional Information
 Earth MOID = 1.4513 AU 
 T_jup = 3.336 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9 mag n/a PDS3 (MPO 5251)  

18643 van Rysselberghe           Discovered 1998 Mar. 1 by E. W. Elst at the European Southern Observatory.
Théo van Rysselberghe (1862-1926) was a Belgian pointillistic painter (Family in the orchard, 1890) who had been influenced by Georges Seurat. After the death of Seurat in 1891, van Rysselberghe gradually abandoned pointillism and returned to the classic French impressionistic style of painting.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070402/MPCPages.arcLast Updated: 2007-07-05

Alternate Designations
 1998 EK12 = 1969 UE = 1991 RY26 = 1991 VH14 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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