+ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2568610546577288 7.0006e-08   a 2.567477827670515 1.4544e-08 au q 1.907992765044732 1.8402e-07 au i 3.365107706666986 7.8625e-06 deg node 180.1120017218441 8.4032e-05 deg peri 122.7291053333287 8.4871e-05 deg M 242.9390324151377 1.2169e-05 deg tp 2459489.116454780495 (2021-Oct-01.61645478) 5.2684e-05 TDB period 1502.652227724494 4.11 1.2768e-05 3.496e-08 d yr n .2395763925663341 2.0357e-09 deg/d Q 3.226962890296298 1.828e-08 au   Orbit Determination Parameters    # obs. used (total)      418      data-arc span      10139 days (27.76 yr)      first obs. used      1992-04-29      last obs. used      2020-02-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60001      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 03:36:55   Additional Information  Earth MOID = .895334 au   Jupiter MOID = 2.0392 au   T_jup = 3.382  [ hide covariance matrix ] Orbital Elements at Epoch 2455886.5 (2011-Nov-21.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2593339246581716 7.0419e-08   q 1.900123328190417 1.8553e-07 au tp 2456481.728952511247 (2013-Jul-08.22895251) 4.4945e-05 TDB node 180.2413517635496 8.4364e-05 deg peri 122.373650640203 8.5164e-05 deg i 3.358417618282417 7.8612e-06 deg   Orbit Determination Parameters    # obs. used (total)      418      data-arc span      10139 days (27.76 yr)      first obs. used      1992-04-29      last obs. used      2020-02-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60001      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 03:36:55   Additional Information  Jupiter MOID = 2.0392 au   T_jup = 3.382  Orbit Covariance (6×6)   e q tp node peri i e 4.958895290577398E-15 -1.304635634984461E-14 1.615820577932772E-12 6.526394365797819E-15 3.843767775404769E-13 -1.20327622759436E-14 q -1.304635634984461E-14 3.442118267628831E-14 -4.154948939249115E-12 -1.543956950701157E-14 -1.006300112121601E-12 3.15306851837254E-14 tp 1.615820577932772E-12 -4.154948939249115E-12 2.020059184135309E-9 1.51797357141997E-11 5.340520647136314E-10 -6.317765141017996E-12 node 6.526394365797819E-15 -1.543956950701157E-14 1.51797357141997E-11 7.117218276221943E-9 -7.099983365268156E-9 -2.627494143413743E-10 peri 3.843767775404769E-13 -1.006300112121601E-12 5.340520647136314E-10 -7.099983365268156E-9 7.252857617465052E-9 2.606516866715761E-10 i -1.20327622759436E-14 3.15306851837254E-14 -6.317765141017996E-12 -2.627494143413743E-10 2.606516866715761E-10 6.179914949651856E-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 ] 2020-Aug-04 08:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin