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11427 Willemkolff (2611 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2011427
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09431407045822283 5.8388e-08  
a 3.16230921588165 3.2287e-08 AU
q 2.864058961684301 1.9428e-07 AU
i 5.470902583612506 7.115e-06 deg
node 178.7200155810369 5.1455e-05 deg
peri 131.2022992845221 6.1061e-05 deg
M 267.2687548128193 3.5658e-05 deg
tp 2457529.588738944087
(2016-May-21.08873894)
0.00020658 JED
period 2054.021226992024
5.62
3.1457e-05
8.612e-08
d
yr
n .1752659589244829 2.6842e-09 deg/d
Q 3.460559470078999 3.5332e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1116  
   data-arc span      19626 days (53.73 yr)  
   first obs. used      1960-09-24  
   last obs. used      2014-06-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50806  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:20:35  

Additional Information
 Earth MOID = 1.85466 AU 
 T_jup = 3.191 
[ 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 12.9 mag n/a MPO263452  

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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