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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09491274252553299 8.5934e-08  
a 2.703645892201773 2.5888e-08 AU
q 2.447035445755011 2.3872e-07 AU
i 10.38039436791317 1.0571e-05 deg
node 27.16789087427905 3.6719e-05 deg
peri 315.1138234960429 5.945e-05 deg
M 105.5575054802619 4.4829e-05 deg
tp 2456524.387307805942
(2013-Aug-19.88730781)
0.00020222 JED
period 1623.764870248008
4.45
2.3322e-05
6.385e-08
d
yr
n .2217069765433556 3.1844e-09 deg/d
Q 2.960256338648534 2.8346e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      837  
   data-arc span      16167 days (44.26 yr)  
   first obs. used      1969-10-16  
   last obs. used      2014-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49478  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:10:26  

Additional Information
 Earth MOID = 1.45315 AU 
 T_jup = 3.336 
[ 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 MPO263514  

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

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