+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14143 Hadfield (1998 SQ18) Classification: Main-belt Asteroid          SPK-ID: 2014143 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1365454089358811 3.2996e-08   a 2.378848755215407 5.7086e-09 au q 2.054027879137907 7.8351e-08 au i 5.969130299401676 3.7e-06 deg node 169.2504973241832 2.5268e-05 deg peri 177.1955100179215 2.7598e-05 deg M 37.29605392801646 1.012e-05 deg tp 2459061.661773756593 (2020-Jul-31.16177376) 3.7743e-05 TDB period 1340.135381187892 3.67 4.824e-06 1.321e-08 d yr n .2686295765737468 9.6697e-10 deg/d Q 2.703669631292906 6.4881e-09 au   Orbit Determination Parameters    # obs. used (total)      1940      data-arc span      24234 days (66.35 yr)      first obs. used      1954-10-31      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49789      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:18:04   Additional Information  Earth MOID = 1.04522 au   Jupiter MOID = 2.70164 au   T_jup = 3.520  [ 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 14.71   n/a E2021B10   14143 Hadfield           Discovered 1998 Sept. 18 by Spacewatch at Kitt Peak. Chris Austin Hadfield (b. 1959), selected as a Canadian astronaut in 1992, flew on space shuttle missions STS-74 and STS-100. 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 SQ18 = 1987 SB7 = 1994 NK2 = 2030 T-1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jun-17 00:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin