+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1806451264550681 3.1709e-08   a 2.238307473323305 6.968e-09 au q 1.833968136759493 7.0401e-08 au i 3.227550735287567 4.2142e-06 deg node 12.29730767550862 6.459e-05 deg peri 260.5140982098193 6.5657e-05 deg M 226.3883423488919 1.2087e-05 deg tp 2459850.462412493388 (2022-Sep-27.96241249) 4.1401e-05 TDB period 1223.145280663796 3.35 5.7116e-06 1.564e-08 d yr n .2943231729632554 1.3744e-09 deg/d Q 2.642646809887118 8.2268e-09 au   Orbit Determination Parameters    # obs. used (total)      1166      data-arc span      9530 days (26.09 yr)      first obs. used      1995-02-06      last obs. used      2021-03-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49183      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:51:03   Additional Information  Earth MOID = .821083 au   Jupiter MOID = 2.46813 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-Aug-01 05:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin