+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14163 Johnchapman (1998 TY20) Classification: Main-belt Asteroid          SPK-ID: 2014163 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07510536528643305 3.6215e-08   a 2.876498248937244 1.5001e-08 au q 2.660457797205027 1.0282e-07 au i .7950611966721282 4.2006e-06 deg node 294.4346871201541 0.00036918 deg peri 145.7572012912783 0.00037101 deg M 150.6477262794782 3.7417e-05 deg tp 2458454.816251140293 (2018-Dec-02.31625114) 0.00018328 TDB period 1781.946241203 4.88 1.394e-05 3.817e-08 d yr n .2020262966838788 1.5804e-09 deg/d Q 3.092538700669461 1.6128e-08 au   Orbit Determination Parameters    # obs. used (total)      1041      data-arc span      9739 days (26.66 yr)      first obs. used      1993-10-12      last obs. used      2020-06-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52916      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:18:36   Additional Information  Earth MOID = 1.67578 au   Jupiter MOID = 2.07308 au   T_jup = 3.292  [ 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 14.69   n/a E2021B10   14163 Johnchapman           Discovered 1998 Oct. 13 by Spacewatch at Kitt Peak. John Herbert Chapman (1921-1979) began his career researching radio propagation and the ionosphere. He worked on the Alouette, ISIS and Hermes satellite projects and was known as the "Father of the Canadian Space Program". 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 ] Alternate Designations  1998 TY20 = 1996 HP13  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 08:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin