+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   117261 (2004 SS57) Classification: Main-belt Asteroid          SPK-ID: 2117261 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .130469100064061 5.5753e-08   a 3.104055598221926 2.7365e-08 au q 2.699072257773101 1.7012e-07 au i 16.05844750919211 6.4025e-06 deg node 214.2592059751183 1.7817e-05 deg peri 191.5594538333475 2.7237e-05 deg M 301.4757433650079 2.0281e-05 deg tp 2459325.232734348524 (2021-Apr-20.73273435) 0.00011373 TDB period 1997.527027033967 5.47 2.6415e-05 7.232e-08 d yr n .1802228431094356 2.3832e-09 deg/d Q 3.509038938670752 3.0935e-08 au   Orbit Determination Parameters    # obs. used (total)      610      data-arc span      9796 days (26.82 yr)      first obs. used      1993-10-09      last obs. used      2020-08-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5167      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 09:58:35   Additional Information  Earth MOID = 1.70951 au   Jupiter MOID = 1.91515 au   T_jup = 3.148  [ show covariance matrix ] [ 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 14.7   n/a MPO417610   117261 (2004 SS57)          Discovered 2004-Sep-16 by LONEOS at Anderson Mesa Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1948-Jan-07 20:23 00:02 Jupiter 1.99451906902214 1.9945179119288 1.99452022611865 4.16661444192296 4.06341306995869 2432558.349271237 2.45632379641638 186.563326701673 42.1489044869935 -76.4587682175036 2547975.9931408 T 18 CATAB v2.0f-lin.ifort 2020-Aug-25 09:58:38 2020-Aug-25 09:58 1958-Mar-20 09:48 00:02 Jupiter 1.99575827444769 1.99575741047133 1.99575913842984 4.57171865835513 4.47792236855042 2436282.908516554 1.91520107241658 224.032014002632 25.528287498117 81.1698038816869 2848524.84508857 T 18 CATAB v2.0f-lin.ifort 2020-Aug-25 09:58:38 2020-Aug-25 09:58 2018-Oct-23 02:21 < 00:01 Jupiter 1.93490447036559 1.9349038869473 1.93490505378376 4.34551424818996 4.24358049162766 2458414.597609930 0.356178762151517 102.998703603183 27.3795189134909 88.1883777915182 2761767.99077867 T 18 CATAB v2.0f-lin.ifort 2020-Aug-25 09:58:38 2020-Aug-25 09:58 2089-Aug-11 16:38 00:03 Jupiter 1.90793071844192 1.90793017060757 1.90793126627627 4.47559153186373 4.37527405396099 2484275.192903964 2.59860992473189 317.524514253513 26.0239704365365 -89.8834908150082 2645997.94014829 T 18 CATAB v2.0f-lin.ifort 2020-Aug-25 09:58:38 2020-Aug-25 09:58 2160-Jun-04 06:03 00:05 Jupiter 1.91847374854849 1.91847278841351 1.91847470873777 4.56769672447922 4.46999287649839 2510138.751953211 4.96132557568943 614.37961412476 24.5042863125125 86.435693619928 2767265.87699385 T 18 CATAB v2.0f-lin.ifort 2020-Aug-25 09:58:38 2020-Aug-25 09:58 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-01 01:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin