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JPL Small-Body Database Browser
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18449 Rikwouters (1994 PT19)
Classification: Main-belt Asteroid          SPK-ID: 2018449
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1821147876694905 3.4682e-08  
a 3.105081257992433 1.8355e-08 au
q 2.539600043996627 1.1044e-07 au
i 1.853658988303283 4.3098e-06 deg
node 182.0219731909524 0.00012491 deg
peri 124.5068566691383 0.00012548 deg
M 269.3378831499155 1.3662e-05 deg
tp 2459503.804989745808
(2021-Oct-16.30498975)
7.8177e-05 TDB
period 1998.517160239041
5.47
1.772e-05
4.851e-08
d
yr
n .1801335545985208 1.5972e-09 deg/d
Q 3.670562471988239 2.1697e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1526  
   data-arc span      10172 days (27.85 yr)  
   first obs. used      1992-03-02  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5421  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:46:54  

Additional Information
 Earth MOID = 1.52529 au 
 Jupiter MOID = 1.59486 au 
 T_jup = 3.194 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6   n/a MPO337414  
rotation period rot_per 3.65 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

18449 Rikwouters           Discovered 1994 Aug. 12 by E. W. Elst at the European Southern Observatory.
Rik Wouters (1882-1916) was a Belgian fauve painter and sculptor. Fascinated by the work of James Ensor, he started painting with a pallet knife. He chose his wife Nel as the primary model for his paintings (Woman in a white sweater, 1908) and sculptures (Domestic concerns, 1913).
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
 1994 PT19 = 1998 FY4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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