+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120997 (1998 XT96) Classification: Main-belt Asteroid          SPK-ID: 2120997 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1815696549345337 4.6197e-08   a 2.322140185133669 9.174e-09 au q 1.900509993009335 1.0866e-07 au i 3.3471602794986 4.4742e-06 deg node 111.4695559037834 7.6607e-05 deg peri 316.6274256609241 7.7987e-05 deg M 50.08320023507252 1.1448e-05 deg tp 2458820.687181275176 (2019-Dec-03.18718128) 4.1334e-05 TDB period 1292.501566136053 3.54 7.6594e-06 2.097e-08 d yr n .278529643160297 1.6506e-09 deg/d Q 2.743770377258004 1.084e-08 au   Orbit Determination Parameters    # obs. used (total)      374      data-arc span      7722 days (21.14 yr)      first obs. used      1998-12-11      last obs. used      2020-02-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53653      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 06:25:23   Additional Information  Earth MOID = .916311 au   Jupiter MOID = 2.5463 au   T_jup = 3.552  [ 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 17.0   n/a MPO502803   120997 (1998 XT96)          Discovered 1998-Dec-11 by Naranjo, O. A. at Merida Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 [ show close-approach data ] Alternate Designations  1998 XT96 = 2001 UU18  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-31 14:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin