+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16588 Johngee (1992 ST) Classification: Mars-crossing Asteroid          SPK-ID: 2016588 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3856210426262752 6.8592e-08   a 2.562312492993508 1.9453e-08 au q 1.574230877911021 1.6914e-07 au i 8.102069631258397 7.3447e-06 deg node 30.44042948752103 3.8237e-05 deg peri 16.71592752176525 4.0727e-05 deg M 308.4057893440286 2.5569e-05 deg tp 2459415.206424519336 (2021-Jul-19.70642452) 0.00010855 TDB period 1498.119882913938 4.10 1.706e-05 4.671e-08 d yr n .2403011962565889 2.7365e-09 deg/d Q 3.550394108075995 2.6954e-08 au   Orbit Determination Parameters    # obs. used (total)      522      data-arc span      11163 days (30.56 yr)      first obs. used      1988-11-09      last obs. used      2019-06-03      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5662      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:35:52   Additional Information  Earth MOID = .584756 au   Jupiter MOID = 1.88049 au   T_jup = 3.313  [ 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 15.2   n/a MPO473988   16588 Johngee           Discovered 1992 Sept. 23 by E. F. Helin at Palomar. For more than half a century John Gee has provided leadership and service to the Caltech Class of 1953 and the Caltech community, including a stint as president of the Alumni Association. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030614/MPCPages.arc Last Updated: 2005-04-26 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 16:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin