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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0955238760616849 3.5925e-08  
a 3.162876658372312 1.7397e-08 au
q 2.860746420459559 1.145e-07 au
i 5.471016804131327 4.2106e-06 deg
node 178.6948925787732 3.9157e-05 deg
peri 130.9627530423431 4.4234e-05 deg
M 187.7417722016083 2.1503e-05 deg
tp 2459583.603597380217
(2022-Jan-04.10359738)
0.00012512 TDB
period 2054.574109929293
5.63
1.6952e-05
4.641e-08
d
yr
n .1752187951070741 1.4457e-09 deg/d
Q 3.465006896285065 1.9059e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2283  
   data-arc span      21594 days (59.12 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47017  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:35:51  

Additional Information
 Earth MOID = 1.84957 au 
 Jupiter MOID = 1.79098 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 13.0   n/a MPO344394  
diameter diameter 11.549 km 0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1904-Dec-26 16:59 00:03 Jupiter 1.83920418892642 1.83920343324465 1.83920494461207 3.50466087388919 3.3706932258606 2416841.207907070 2.84659991717829 162.688592036637 14.7162507391365 -81.961064761709 3425076.13278661 T 32 CATAB v2.0f-lin.ifort 2019-Dec-03 22:36:07 2019-Dec-03 22:36
1990-Oct-30 13:37 < 00:01 Jupiter 1.87886293679489 1.87886249791057 1.87886337567909 2.58357198209148 2.40275073142544 2448195.067215123 0.687857778928062 44.1845764582922 12.6565517723161 86.1125939688708 3293557.99060095 T 32 CATAB v2.0f-lin.ifort 2019-Dec-03 22:36:07 2019-Dec-03 22:36
2001-Jun-22 17:12 < 00:01 Jupiter 1.78587891346372 1.78587855260797 1.78587927431946 2.53216094495815 2.33736203535309 2452083.217000862 0.399749358446152 40.8202231238328 7.54347004023966 77.0118883753201 3616102.04129277 T 32 CATAB v2.0f-lin.ifort 2019-Dec-03 22:36:07 2019-Dec-03 22:36
2012-Feb-14 17:44 < 00:01 Jupiter 1.81931393831638 1.81931358267255 1.81931429396021 3.28715489829528 3.14233071944735 2455972.238750044 0.178993439534621 35.7595450996388 13.1992478463569 86.3863296121595 3676253.18357595 T 32 CATAB v2.0f-lin.ifort 2019-Dec-03 22:36:07 2019-Dec-03 22:36
2022-Oct-17 02:53 < 00:01 Jupiter 1.98154569850438 1.98154532297497 1.98154607403379 4.27311450146237 4.17188166598458 2459869.620126147 0.284818723597569 33.7526453020645 16.1200859924979 -82.8838954840893 4305301.71352885 T 32 CATAB v2.0f-lin.ifort 2019-Dec-03 22:36:07 2019-Dec-03 22:36
2097-Dec-20 00:22 00:02 Jupiter 1.91775980340775 1.91775924374716 1.91776036306878 2.74483484182633 2.5789091740005 2487327.515539645 2.10038303527898 89.1297568420858 14.2388064544099 -84.5869705734009 3191465.88392562 T 32 CATAB v2.0f-lin.ifort 2019-Dec-03 22:36:07 2019-Dec-03 22:36
2108-Aug-16 06:52 00:02 Jupiter 1.80848370592511 1.80848328444189 1.80848412740833 2.46279149766164 2.26464583511604 2491218.785927461 2.489972039891 40.4651011116675 15.2719079647174 75.1636404534444 3665367.92621741 T 32 CATAB v2.0f-lin.ifort 2019-Dec-03 22:36:07 2019-Dec-03 22:36
2119-Apr-07 16:18 00:03 Jupiter 1.81379116617332 1.81379073189937 1.81379160044794 3.06783632881273 2.91163863535237 2495105.178897548 2.7848304665213 122.73981301206 12.6095099170383 89.3913378545269 3257876.83078262 T 32 CATAB v2.0f-lin.ifort 2019-Dec-03 22:36:07 2019-Dec-03 22:36
2129-Dec-05 19:28 00:03 Jupiter 1.93996302141982 1.93996215481507 1.93996388802964 4.07541746153365 3.96683649177225 2499000.310795107 3.00387829229981 180.958371950688 16.1434436015419 -79.4262038731725 3974205.15624262 T 32 CATAB v2.0f-lin.ifort 2019-Dec-03 22:36:07 2019-Dec-03 22:36

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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