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11427 Willemkolff (2611 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2011427
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09627956799014459 3.2208e-08  
a 3.161904952079479 1.5609e-08 au
q 2.857478109267368 1.057e-07 au
i 5.47250397555056 4.0869e-06 deg
node 178.6884136139816 3.4058e-05 deg
peri 131.138650944895 3.9443e-05 deg
M 327.1532576115933 2.1057e-05 deg
tp 2459583.874914047239
(2022-Jan-04.37491405)
0.00012055 TDB
period 2053.62736612853
5.62
1.5207e-05
4.163e-08
d
yr
n .1752995728132836 1.2981e-09 deg/d
Q 3.46633179489159 1.7112e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2684  
   data-arc span      22182 days (60.73 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44317  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 02:42:19  

Additional Information
 Earth MOID = 1.84653 au 
 Jupiter MOID = 1.79064 au 
 T_jup = 3.190 
[ 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 13.02   n/a E2021B10  
diameter diameter 11.549 km 0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 17.8395 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.100   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11427 Willemkolff           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld at Leiden on Palomar Schmidt plates taken by T. Gehrels.
Born in Leiden, Willem Johan Kolff (b. 1911) invented the first kidney dialysis machine while working in harsh conditions in Kampen during World War II. After the war he moved to the U.S. and in 1967 became professor of surgery at the University of Utah, working with his student Robert Jarvik on an artificial heart.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070926/MPCPages.arcLast Updated: 2007-09-30

[ show close-approach data ]
Alternate Designations
 2611 P-L = 1998 KR3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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