+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11431 Karelbosscha (4843 T-1) Classification: Main-belt Asteroid          SPK-ID: 2011431 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1213884445211451 4.6186e-08   a 3.150586877554642 2.678e-08 au q 2.768142037159552 1.4108e-07 au i 5.86551832537213 5.0387e-06 deg node 35.69912449131986 4.8987e-05 deg peri 167.8932947668783 5.2952e-05 deg M 283.2032004085038 2.1757e-05 deg tp 2459436.238804514083 (2021-Aug-09.73880451) 0.00012566 TDB period 2042.610765806442 5.59 2.6043e-05 7.13e-08 d yr n .1762450321061872 2.2471e-09 deg/d Q 3.533031717949731 3.0031e-08 au   Orbit Determination Parameters    # obs. used (total)      824      data-arc span      17823 days (48.80 yr)      first obs. used      1971-04-16      last obs. used      2020-02-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52992      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 20:02:33   Additional Information  Earth MOID = 1.76476 au   Jupiter MOID = 1.42459 au   T_jup = 3.188  [ 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 14.4   n/a MPO431631   diameter diameter 6.810 km 0.173 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.073   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11431 Karelbosscha           Discovered 1971 May 13 by C. J. van Houten and I. van Houten-Groeneveld at Leiden on Palomar Schmidt plates taken by T. Gehrels. Karel Albert Rudolf Bosscha (1865-1928) was a notable Dutch tea planter in Malabar, West Java, who, with his nephew Rudolf Albert Kerkhoven, greatly contributed to the establishment of an astronomical observatory in Lembang, near Bandung. 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.arc Last Updated: 2007-09-30 [ show close-approach data ] Alternate Designations  4843 T-1 = 3199 T-2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-21 02:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin