+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3861837900312989 6.8712e-08   a 2.562411844556166 1.8051e-08 au q 1.572849926804374 1.7022e-07 au i 8.104926785969631 7.3504e-06 deg node 30.52057112732792 3.8328e-05 deg peri 16.65345461227837 4.0815e-05 deg M 260.3970816067965 2.5138e-05 deg tp 2459415.016086615911 (2021-Jul-19.51608662) 0.00010845 TDB period 1498.207016310785 4.10 1.5831e-05 4.334e-08 d yr n .2402872207116419 2.539e-09 deg/d Q 3.551973762307958 2.5022e-08 au   Orbit Determination Parameters    # obs. used (total)      520      data-arc span      11160 days (30.55 yr)      first obs. used      1988-11-09      last obs. used      2019-05-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56093      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 21:45:09   Additional Information  Earth MOID = .584278 au   Jupiter MOID = 1.87774 au   T_jup = 3.312  [ 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 ] 2020-Oct-27 18:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin