+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120980 (1998 XY5) Classification: Main-belt Asteroid          SPK-ID: 2120980 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1686352568225635 3.6124e-08   a 2.157157659058991 5.0322e-09 au q 1.793384823216818 7.6942e-08 au i 1.563863132236751 4.6192e-06 deg node 187.2121230718186 0.00012293 deg peri 151.4583177644213 0.00012365 deg M 48.63649485899933 1.3019e-05 deg tp 2459044.156069599898 (2020-Jul-13.65606960) 4.175e-05 TDB period 1157.234194347421 3.17 4.0494e-06 1.109e-08 d yr n .311086555995702 1.0886e-09 deg/d Q 2.520930494901163 5.8808e-09 au   Orbit Determination Parameters    # obs. used (total)      792      data-arc span      8116 days (22.22 yr)      first obs. used      1998-10-23      last obs. used      2021-01-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52487      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 09:26:20   Additional Information  Earth MOID = .782708 au   Jupiter MOID = 2.85146 au   T_jup = 3.681  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.9   n/a MPO432709   120980 (1998 XY5)          Discovered 1998-Dec-08 by Spacewatch at Kitt Peak Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-03 19:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin