+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19680 (1999 RE180) Classification: Main-belt Asteroid          SPK-ID: 2019680 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1135978936129328 2.8925e-08   a 2.307562945002951 6.875e-09 au q 2.04542865507136 6.5639e-08 au i 7.29367345002287 3.0052e-06 deg node 53.46587563071011 2.7125e-05 deg peri 237.757060030058 3.1575e-05 deg M 71.10139059933479 1.5566e-05 deg tp 2458947.625896876345 (2020-Apr-08.12589688) 5.5528e-05 TDB period 1280.350164141057 3.51 5.7218e-06 1.567e-08 d yr n .2811730806794653 1.2566e-09 deg/d Q 2.569697234934542 7.6559e-09 au   Orbit Determination Parameters    # obs. used (total)      2601      data-arc span      10900 days (29.84 yr)      first obs. used      1991-03-14      last obs. used      2021-01-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42137      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:44:10   Additional Information  Earth MOID = 1.03821 au   Jupiter MOID = 2.572 au   T_jup = 3.567  [ hide covariance matrix ] Orbital Elements at Epoch 2457365.5 (2015-Dec-09.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1131319758417825 2.8916e-08   q 2.047110303425687 6.5551e-08 au tp 2457667.613400401730 (2016-Oct-06.11340040) 5.7004e-05 TDB node 53.49657903520725 2.711e-05 deg peri 237.9477753405472 3.1587e-05 deg i 7.295197652333679 3.0057e-06 deg   Orbit Determination Parameters    # obs. used (total)      2601      data-arc span      10900 days (29.84 yr)      first obs. used      1991-03-14      last obs. used      2021-01-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42137      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:44:10   Additional Information  Jupiter MOID = 2.572 au   T_jup = 3.567  Orbit Covariance (6×6)   e q tp node peri i e 8.361274338903297E-16 -1.887618532228485E-15 3.162636891770606E-13 -7.419958060323256E-15 7.521206401763785E-14 -1.106166614924595E-15 q -1.887618532228485E-15 4.296875520140847E-15 -8.201663670297729E-13 1.725698911186204E-14 -2.021339373384556E-13 2.579916231449855E-15 tp 3.162636891770606E-13 -8.201663670297729E-13 3.249438213544487E-9 -2.829015259132054E-12 9.36246709086209E-10 -4.184454646938752E-12 node -7.419958060323256E-15 1.725698911186204E-14 -2.829015259132054E-12 7.34968493273062E-10 -7.292939883942562E-10 -1.795825234826106E-11 peri 7.521206401763785E-14 -2.021339373384556E-13 9.36246709086209E-10 -7.292939883942562E-10 9.977165963094629E-10 1.665164250024343E-11 i -1.106166614924595E-15 2.579916231449855E-15 -4.184454646938752E-12 -1.795825234826106E-11 1.665164250024343E-11 9.034295855689759E-12 [ 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 13.86   n/a E2021B10   19680 (1999 RE180)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20001211/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 RE180 = 1991 EB1 = 1998 FL92  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-08 16:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin