+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   80387 (1999 XG168) Classification: Main-belt Asteroid          SPK-ID: 2080387 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2401526862071904 4.6914e-08   a 2.361157158431633 7.1715e-09 au q 1.79411892427694 1.0953e-07 au i 2.089519807870157 4.8267e-06 deg node 359.1865624495759 0.00010407 deg peri 30.90335449155759 0.00010446 deg M 262.5077441843016 7.7587e-06 deg tp 2459359.383413860249 (2021-May-24.88341386) 2.9228e-05 TDB period 1325.213248054578 3.63 6.0376e-06 1.653e-08 d yr n .2716543926258528 1.2376e-09 deg/d Q 2.928195392586326 8.8938e-09 au   Orbit Determination Parameters    # obs. used (total)      893      data-arc span      9114 days (24.95 yr)      first obs. used      1995-08-01      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5084      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 21:19:46   Additional Information  Earth MOID = .799821 au   Jupiter MOID = 2.52171 au   T_jup = 3.511  [ hide covariance matrix ] Orbital Elements at Epoch 2456570.5 (2013-Oct-05.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2396259133958638 4.6662e-08   q 1.794880163128527 1.0859e-07 au tp 2456711.388399476704 (2014-Feb-22.88839948) 2.7024e-05 TDB node 359.2646666998162 0.00010408 deg peri 31.06590916318471 0.00010447 deg i 2.09024136239695 4.8247e-06 deg   Orbit Determination Parameters    # obs. used (total)      893      data-arc span      9114 days (24.95 yr)      first obs. used      1995-08-01      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5084      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 21:19:46   Additional Information  Jupiter MOID = 2.52171 au   T_jup = 3.511  Orbit Covariance (6×6)   e q tp node peri i e 2.177379935880559E-15 -5.060922434130207E-15 -2.922638223274151E-13 2.818196796024494E-14 -1.715944364216125E-13 -2.185612464273389E-15 q -5.060922434130207E-15 1.17918554629824E-14 6.825395302433457E-13 -6.513033519228832E-14 3.976346184871862E-13 5.141155504850916E-15 tp -2.922638223274151E-13 6.825395302433457E-13 7.303120846258901E-10 -1.624985526717729E-12 2.517920563669161E-10 1.973642929351641E-13 node 2.818196796024494E-14 -6.513033519228832E-14 -1.624985526717729E-12 1.083172968059039E-8 -1.082511646414592E-8 1.003393811557395E-10 peri -1.715944364216125E-13 3.976346184871862E-13 2.517920563669161E-10 -1.082511646414592E-8 1.09142994926229E-8 -1.00172159793554E-10 i -2.185612464273389E-15 5.141155504850916E-15 1.973642929351641E-13 1.003393811557395E-10 -1.00172159793554E-10 2.327778616537902E-11 [ 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 15.8   n/a MPO436342   80387 (1999 XG168)          Discovered 1999-Dec-10 by LINEAR at Socorro Reference: 20040504/Numbers.arc Last Updated: 2004-07-16 [ show close-approach data ] Alternate Designations  1999 XG168 = 2002 NF9  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-15 15:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin