+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3853715631793502 6.8483e-08   a 2.561165947253802 1.8806e-08 au q 1.574165422598883 1.6899e-07 au i 8.103235204921267 7.3459e-06 deg node 30.42609385330828 3.823e-05 deg peri 16.7593706088063 4.0733e-05 deg M 355.4855002122908 2.6072e-05 deg tp 2459415.274230317945 (2021-Jul-19.77423032) 0.00010861 TDB period 1497.11446057899 4.10 1.6489e-05 4.514e-08 d yr n .2404625761618617 2.6485e-09 deg/d Q 3.548166471908721 2.6053e-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 = .585077 au   Jupiter MOID = 1.88372 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 15.26   n/a MPCxxxxx   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-Aug-04 18:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin