+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15911 Davidgauthier (1997 TL21) Classification: Main-belt Asteroid          SPK-ID: 2015911 [ 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 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2092989461847344 3.2542e-08   a 2.430949411243704 1.0784e-08 au q 1.922154261241996 7.9954e-08 au i 2.137086504254347 5.7352e-06 deg node 15.1250950046247 0.00010099 deg peri 274.1662589968873 0.00010214 deg M 64.52843562290398 1.3828e-05 deg tp 2458752.351905667426 (2019-Sep-25.85190567) 5.3346e-05 TDB period 1384.402288655798 3.79 9.2125e-06 2.522e-08 d yr n .2600400208450581 1.7304e-09 deg/d Q 2.939744561245412 1.3042e-08 au   Orbit Determination Parameters    # obs. used (total)      595      data-arc span      9904 days (27.12 yr)      first obs. used      1993-09-15      last obs. used      2020-10-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52452      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:30:38   Additional Information  Earth MOID = .907331 au   Jupiter MOID = 2.24526 au   T_jup = 3.476  [ 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 16.5   n/a MPO435847   15911 Davidgauthier           Discovered 1997 Oct. 4 by Spacewatch at Kitt Peak. David Gauthier (b. 1932) is an influential political philosopher who earned a D.Phil. from the University of Oxford, then was a faculty member at the University of Toronto and, beginning in 1980, at the University of Pittsburgh. The name was suggested by R. Jedicke and P. Jedicke. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20050523/MPCPages.arc Last Updated: 2005-07-21 [ show close-approach data ] Alternate Designations  1997 TL21 = 1993 SA13  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Dec-05 10:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin