+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   344968 (2004 XT31) Classification: Main-belt Asteroid          SPK-ID: 2344968 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05777241654843288 1.1892e-07   a 2.600451145448017 3.2837e-08 au q 2.450216798659345 3.3219e-07 au i 21.42497521301442 5.1248e-06 deg node 279.009680571553 2.7863e-05 deg peri 117.8878465621372 9.5183e-05 deg M 302.3635464453461 8.5224e-05 deg tp 2459245.725836723054 (2021-Jan-31.22583672) 0.00036232 TDB period 1531.692111080122 4.19 2.9012e-05 7.943e-08 d yr n .235034180430775 4.4518e-09 deg/d Q 2.750685492236689 3.4734e-08 au   Orbit Determination Parameters    # obs. used (total)      277      data-arc span      7200 days (19.71 yr)      first obs. used      2001-01-04      last obs. used      2020-09-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54353      source      ORB      producer      Otto Matic      solution date      2020-Oct-22 23:22:58   Additional Information  Earth MOID = 1.51229 au   Jupiter MOID = 2.53835 au   T_jup = 3.315  [ 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 15.8   n/a MPO291953   344968 (2004 XT31)          Discovered 2004-Dec-09 by CSS at Catalina Reference: 20121128/Numbers.arc Last Updated: 2012-12-03 [ 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 1977-Aug-11 15:35 00:02 Amphi 0.0185243008954851 0.0185203581207943 0.0185282677877698 6.3786720350618 6.37867198640977 2443367.149333945 2.48877126885004 1184.03717543679 84.8758286409033 81.3328301159187 32271.400451134 T 12 CATAB v2.0f-lin.ifort 2020-Oct-22 23:23:15 2020-Oct-22 23:23 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-31 00:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin