+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109988 (2001 SR57) Classification: Main-belt Asteroid          SPK-ID: 2109988 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2568610553500297 7.0004e-08   a 2.567477827301807 1.4405e-08 au q 1.907992762993264 1.8401e-07 au i 3.365107129075212 7.8268e-06 deg node 180.1119956798806 8.3561e-05 deg peri 122.7291118563503 8.4356e-05 deg M 242.9390322451374 1.2134e-05 deg tp 2459489.116455384829 (2021-Oct-01.61645538) 5.2582e-05 TDB period 1502.652227400807 4.11 1.2646e-05 3.462e-08 d yr n .2395763926179415 2.0162e-09 deg/d Q 3.22696289161035 1.8105e-08 au   Orbit Determination Parameters    # obs. used (total)      434      data-arc span      10192 days (27.90 yr)      first obs. used      1992-04-29      last obs. used      2020-03-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60616      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:08:37   Additional Information  Earth MOID = .895334 au   Jupiter MOID = 2.0392 au   T_jup = 3.382  [ hide covariance matrix ] Orbital Elements at Epoch 2455981.5 (2012-Feb-24.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2592225775824603 7.0408e-08   q 1.900631635403019 1.8552e-07 au tp 2456481.748450041204 (2013-Jul-08.24845004) 4.4528e-05 TDB node 180.2418818261339 8.3889e-05 deg peri 122.3545979547732 8.4649e-05 deg i 3.358349880813917 7.8251e-06 deg   Orbit Determination Parameters    # obs. used (total)      434      data-arc span      10192 days (27.90 yr)      first obs. used      1992-04-29      last obs. used      2020-03-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60616      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:08:37   Additional Information  Jupiter MOID = 2.0392 au   T_jup = 3.382  Orbit Covariance (6×6)   e q tp node peri i e 4.957314431453797E-15 -1.304407101783492E-14 1.614620853448806E-12 9.065681813292482E-15 3.810827118297355E-13 -1.179607813377262E-14 q -1.304407101783492E-14 3.441815962709821E-14 -4.143583315654888E-12 -2.196966011303867E-14 -9.94031650183719E-13 3.089902377108385E-14 tp 1.614620853448806E-12 -4.143583315654888E-12 1.982719425426616E-9 1.579766913342699E-11 5.163461653634373E-10 -6.164893351679719E-12 node 9.065681813292482E-15 -2.196966011303867E-14 1.579766913342699E-11 7.037381292612295E-9 -7.020247911247265E-9 -2.691738367082983E-10 peri 3.810827118297355E-13 -9.94031650183719E-13 5.163461653634373E-10 -7.020247911247265E-9 7.16553469596064E-9 2.671138289347163E-10 i -1.179607813377262E-14 3.089902377108385E-14 -6.164893351679719E-12 -2.691738367082983E-10 2.671138289347163E-10 6.123216448077607E-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 16.2   n/a MPO469127   109988 (2001 SR57)          Discovered 2001-Sep-17 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  2001 SR57 = 1992 HG3 = 2000 GX16 = 2001 UK181  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 23:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin