+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120982 (1998 XE6) Classification: Main-belt Asteroid          SPK-ID: 2120982 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1569439675261185 3.018e-08   a 2.31875493009897 7.8694e-09 au q 1.954840331648491 7.0942e-08 au i 4.0293954451676 3.5435e-06 deg node 89.44681452844129 6.2632e-05 deg peri 356.6599218245364 6.4532e-05 deg M 14.29029967280258 1.5519e-05 deg tp 2458949.305944158670 (2020-Apr-09.80594416) 5.5529e-05 TDB period 1289.676250663564 3.53 6.5653e-06 1.797e-08 d yr n .2791398227382825 1.421e-09 deg/d Q 2.68266952854945 9.1044e-09 au   Orbit Determination Parameters    # obs. used (total)      545      data-arc span      7673 days (21.01 yr)      first obs. used      1998-11-21      last obs. used      2019-11-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .61456      source      ORB      producer      Otto Matic      solution date      2019-Dec-04 11:17:03   Additional Information  Earth MOID = .971138 au   Jupiter MOID = 2.51779 au   T_jup = 3.559  [ 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 16.8   n/a MPO417630   120982 (1998 XE6)          Discovered 1998-Dec-08 by Spacewatch at Kitt Peak Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-26 17:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin