+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1138330484165878 2.9247e-08   a 2.308327397914724 6.9598e-09 au q 2.045563453466561 6.6567e-08 au i 7.293446165875022 3.0425e-06 deg node 53.47540632095425 2.7706e-05 deg peri 237.8489306861928 3.2079e-05 deg M 14.77495118206649 1.5601e-05 deg tp 2458947.926354769297 (2020-Apr-08.42635477) 5.5546e-05 TDB period 1280.986451314021 3.51 5.7934e-06 1.586e-08 d yr n .2810334173563789 1.271e-09 deg/d Q 2.571091342362887 7.752e-09 au   Orbit Determination Parameters    # obs. used (total)      2435      data-arc span      10823 days (29.63 yr)      first obs. used      1991-03-14      last obs. used      2020-10-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4181      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:07:13   Additional Information  Earth MOID = 1.04026 au   Jupiter MOID = 2.57221 au   T_jup = 3.567  [ hide covariance matrix ] Orbital Elements at Epoch 2457210.5 (2015-Jul-07.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1131958465134924 2.925e-08   q 2.047534663662085 6.6477e-08 au tp 2457667.091455075743 (2016-Oct-05.59145508) 5.7085e-05 TDB node 53.51918908372751 2.77e-05 deg peri 237.7574497866573 3.211e-05 deg i 7.293796030635773 3.0423e-06 deg   Orbit Determination Parameters    # obs. used (total)      2435      data-arc span      10823 days (29.63 yr)      first obs. used      1991-03-14      last obs. used      2020-10-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4181      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:07:13   Additional Information  Jupiter MOID = 2.57221 au   T_jup = 3.567  Orbit Covariance (6×6)   e q tp node peri i e 8.555853713070848E-16 -1.936477796947167E-15 3.065001950792963E-13 -8.670860468081456E-15 7.534563923363175E-14 -1.17578303854216E-15 q -1.936477796947167E-15 4.419189886039559E-15 -7.937725801995844E-13 2.039010511203249E-14 -2.017407189493557E-13 2.679559898263121E-15 tp 3.065001950792963E-13 -7.937725801995844E-13 3.258705291504797E-9 -5.427351293182208E-12 9.399745457000846E-10 -4.335677376912171E-12 node -8.670860468081456E-15 2.039010511203249E-14 -5.427351293182208E-12 7.672883952276347E-10 -7.62113013381402E-10 -1.544340920089737E-11 peri 7.534563923363175E-14 -2.017407189493557E-13 9.399745457000846E-10 -7.62113013381402E-10 1.031043603581378E-9 1.412040378694133E-11 i -1.17578303854216E-15 2.679559898263121E-15 -4.335677376912171E-12 -1.544340920089737E-11 1.412040378694133E-11 9.255694035791384E-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 13.8   n/a MPO384923   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 ] 2020-Nov-30 18:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin