+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102943 (1999 XY51) Classification: Main-belt Asteroid          SPK-ID: 2102943 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1735291854595931 3.9559e-08   a 3.043112452292075 2.0433e-08 au q 2.515043627183886 1.2908e-07 au i 7.163347116340947 5.5155e-06 deg node 58.34085885659979 3.471e-05 deg peri 51.03027132942967 3.9354e-05 deg M 309.9722180625672 1.7908e-05 deg tp 2459469.953715216180 (2021-Sep-12.45371522) 9.7526e-05 TDB period 1938.989371928217 5.31 1.9529e-05 5.347e-08 d yr n .1856637304009563 1.8699e-09 deg/d Q 3.571181277400263 2.3979e-08 au   Orbit Determination Parameters    # obs. used (total)      583      data-arc span      9053 days (24.79 yr)      first obs. used      1996-03-26      last obs. used      2021-01-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52916      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:44:22   Additional Information  Earth MOID = 1.53909 au   Jupiter MOID = 1.61954 au   T_jup = 3.204  [ hide covariance matrix ] Orbital Elements at Epoch 2457655.5 (2016-Sep-24.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1693752043816388 3.9663e-08   q 2.530905208665962 1.2896e-07 au tp 2457529.346467596192 (2016-May-20.84646760) 9.5241e-05 TDB node 58.39991197236579 3.4737e-05 deg peri 51.18055311722608 3.9635e-05 deg i 7.158077363494443 5.5133e-06 deg   Orbit Determination Parameters    # obs. used (total)      583      data-arc span      9053 days (24.79 yr)      first obs. used      1996-03-26      last obs. used      2021-01-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52916      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:44:22   Additional Information  Jupiter MOID = 1.61954 au   T_jup = 3.204  Orbit Covariance (6×6)   e q tp node peri i e 1.573185048586756E-15 -5.079418132245473E-15 -4.699395497113768E-13 4.605402380441058E-15 -2.835925156798224E-14 -1.622449739755281E-15 q -5.079418132245473E-15 1.662959647933145E-14 1.678152814639948E-12 -2.182961455396106E-14 1.332217849920319E-13 7.556409727196214E-15 tp -4.699395497113768E-13 1.678152814639948E-12 9.070942387713505E-9 -8.906197293647466E-12 1.83135156689908E-9 4.969018573193233E-12 node 4.605402380441058E-15 -2.182961455396106E-14 -8.906197293647466E-12 1.206673304883044E-9 -1.199164791661582E-9 -7.704643714226655E-11 peri -2.835925156798224E-14 1.332217849920319E-13 1.83135156689908E-9 -1.199164791661582E-9 1.570949386383336E-9 7.748167509656281E-11 i -1.622449739755281E-15 7.556409727196214E-15 4.969018573193233E-12 -7.704643714226655E-11 7.748167509656281E-11 3.039673864933337E-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 15.2   n/a MPO493578   102943 (1999 XY51)          Discovered 1999-Dec-07 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 XY51 = 2001 FT66  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 00:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin