+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .168790142927536 3.695e-08   a 2.157487452296591 7.7633e-09 au q 1.793324836859084 7.7916e-08 au i 1.563745395242024 4.7591e-06 deg node 187.213882354323 0.00015686 deg peri 151.4364059831716 0.00015793 deg M 346.4353034351639 2.1484e-05 deg tp 2459044.114251867312 (2020-Jul-13.61425187) 6.9236e-05 TDB period 1157.49958704823 3.17 6.2476e-06 1.71e-08 d yr n .3110152297488464 1.6787e-09 deg/d Q 2.521650067734098 9.0737e-09 au   Orbit Determination Parameters    # obs. used (total)      554      data-arc span      7952 days (21.77 yr)      first obs. used      1998-10-23      last obs. used      2020-07-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58539      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 10:11:41   Additional Information  Earth MOID = .784513 au   Jupiter MOID = 2.85077 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 ] 2020-Oct-25 12:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin