+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109924 (2001 SO31) Classification: Main-belt Asteroid          SPK-ID: 2109924 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1050315959912528 7.1198e-08   a 2.642739699719802 1.9046e-08 au q 2.365168531268787 1.9218e-07 au i 13.40691778889359 5.4036e-06 deg node 17.58688517736759 2.0063e-05 deg peri 168.3322499948477 3.0079e-05 deg M 356.7503613229823 2.5882e-05 deg tp 2459214.664869715369 (2020-Dec-31.16486972) 0.00011288 TDB period 1569.206180858414 4.30 1.6964e-05 4.644e-08 d yr n .229415359429101 2.4801e-09 deg/d Q 2.920310868170818 2.1047e-08 au   Orbit Determination Parameters    # obs. used (total)      670      data-arc span      8037 days (22.00 yr)      first obs. used      1999-02-10      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .58522      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 16:18:00   Additional Information  Earth MOID = 1.36646 au   Jupiter MOID = 2.03465 au   T_jup = 3.348  [ 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 15.12   n/a E2021B55   109924 (2001 SO31)          Discovered 2001-Sep-16 by LINEAR at Socorro 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 1938-Jan-11 12:38 < 00:01 Inter 0.0118908138165561 0.0118685959314267 0.0119130329525701 8.23149957601197 8.23149942644759 2428910.026559516 0.852332560307009 1124.33827688743 60.5173860045155 9.87672151407446 5273.75175952678 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 16:18:02 2021-Apr-13 16:18 Alternate Designations  2001 SO31 = 1999 CZ58  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-15 06:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin