+ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1304690473986079 4.6513e-08   a 3.104055566253758 2.034e-08 au q 2.699072393452284 1.5039e-07 au i 16.05845157539458 5.4856e-06 deg node 214.2592184888673 1.4779e-05 deg peri 191.5594349336415 2.5087e-05 deg M 301.475757972358 1.8569e-05 deg tp 2459325.232648280368 (2021-Apr-20.73264828) 0.00010305 TDB period 1997.526996175654 5.47 1.9634e-05 5.375e-08 d yr n .1802228458935646 1.7714e-09 deg/d Q 3.509038739055232 2.2994e-08 au   Orbit Determination Parameters    # obs. used (total)      894      data-arc span      9900 days (27.10 yr)      first obs. used      1993-10-09      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48614      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:44:07   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 20:24 00:02 Jupiter 1.99451952959223 1.99451871564656 1.99452034354095 4.16661498232902 4.06341364822348 2432558.349855249 1.97858096180894 169.46815448015 27.4349490963976 -78.8537816521808 3006579.66100287 T 20 CATAB v2.0f-lin.ifort 2020-Dec-17 22:44:08 2020-Dec-17 22:44 1958-Mar-20 09:49 00:02 Jupiter 1.99575820494779 1.9957573662011 1.99575904369856 4.5717200331908 4.47792376888337 2436282.909006908 1.53336070824522 177.118138692037 21.6993879995422 78.4843333703341 3247798.69555784 T 20 CATAB v2.0f-lin.ifort 2020-Dec-17 22:44:08 2020-Dec-17 22:44 2018-Oct-23 02:20 < 00:01 Jupiter 1.93490462090362 1.93490413101866 1.9349051107887 4.34551590481798 4.24358219607484 2458414.597550862 0.327290760852359 90.7989723342082 22.2879364583494 -86.9001465713301 3801373.66202058 T 20 CATAB v2.0f-lin.ifort 2020-Dec-17 22:44:08 2020-Dec-17 22:44 2089-Aug-11 16:37 00:02 Jupiter 1.90793084539614 1.90793036978168 1.90793132101288 4.4755936855856 4.37527626381564 2484275.192243265 2.02694164219655 241.547445275786 20.3302350115357 -87.5055891324269 3375725.94660882 T 20 CATAB v2.0f-lin.ifort 2020-Dec-17 22:44:08 2020-Dec-17 22:44 2160-Jun-04 06:01 00:04 Jupiter 1.91847416934861 1.91847356109322 1.9184747776281 4.56769894705516 4.46999516931942 2510138.750694190 3.88401880512969 477.61140727789 19.7201229157173 87.4793706412311 3345316.89101096 T 20 CATAB v2.0f-lin.ifort 2020-Dec-17 22:44:08 2020-Dec-17 22:44 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-18 23:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin