+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102997 (1999 XF94) Classification: Mars-crossing Asteroid          SPK-ID: 2102997 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2982259589714434 4.9584e-08   a 2.278627374013519 1.2793e-08 au q 1.599081540259756 1.1599e-07 au i 22.96790968203222 7.3938e-06 deg node 104.588035311546 1.3746e-05 deg peri 276.2035415945662 1.8512e-05 deg M 92.41147342788857 1.1524e-05 deg tp 2458877.998464673742 (2020-Jan-29.49846467) 3.976e-05 TDB period 1256.343486483305 3.44 1.058e-05 2.897e-08 d yr n .2865458402683284 2.4131e-09 deg/d Q 2.958173207767283 1.6608e-08 au   Orbit Determination Parameters    # obs. used (total)      752      data-arc span      7767 days (21.26 yr)      first obs. used      1999-10-10      last obs. used      2021-01-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5296      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:33:00   Additional Information  Earth MOID = .774408 au   Jupiter MOID = 2.84531 au   T_jup = 3.447  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.03   n/a E2021B55   102997 (1999 XF94)          Discovered 1999-Dec-07 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-05 02:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin