+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21642 Kominers (1999 NH41) Classification: Main-belt Asteroid          SPK-ID: 2021642 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1807749666330344 3.171e-08   a 2.238098940608683 6.9499e-09 au q 1.833506679298719 7.0394e-08 au i 3.227540575437375 4.2231e-06 deg node 12.30278055044642 6.4601e-05 deg peri 260.4921314165977 6.5672e-05 deg M 168.7244247398583 1.2058e-05 deg tp 2458627.317655287926 (2019-May-23.81765529) 4.0753e-05 TDB period 1222.974352495161 3.35 5.6965e-06 1.56e-08 d yr n .2943643088389495 1.3711e-09 deg/d Q 2.642691201918648 8.2062e-09 au   Orbit Determination Parameters    # obs. used (total)      1162      data-arc span      9477 days (25.95 yr)      first obs. used      1995-02-06      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49084      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:53:45   Additional Information  Earth MOID = .818931 au   Jupiter MOID = 2.46924 au   T_jup = 3.613  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.46   n/a E2021B10   21642 Kominers           Discovered 1999 July 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Scott Duke Kominers (b. 1987) was awarded second place in the 2005 Intel International Science and Engineering Fair for his mathematics project. He attends the Walt Whitman High School, Bethesda, Maryland, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20050822/MPCPages.arc Last Updated: 2005-08-26 Alternate Designations  1999 NH41 = 1995 DE7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-10 20:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin