+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102988 (1999 XC88) Classification: Main-belt Asteroid          SPK-ID: 2102988 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ 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 .2541396672324043 4.0881e-08   a 2.692198066019357 1.3804e-08 au q 2.008003745397475 1.1233e-07 au i 7.376174472291616 4.3463e-06 deg node 254.9969173562128 3.5273e-05 deg peri 131.9233484692523 3.6247e-05 deg M 270.9241395307237 1.0729e-05 deg tp 2459399.723836922413 (2021-Jul-04.22383692) 5.0375e-05 TDB period 1613.462733168212 4.42 1.2409e-05 3.397e-08 d yr n .2231225999828954 1.7161e-09 deg/d Q 3.376392386641238 1.7312e-08 au   Orbit Determination Parameters    # obs. used (total)      744      data-arc span      7590 days (20.78 yr)      first obs. used      1999-10-12      last obs. used      2020-07-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53108      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:51:21   Additional Information  Earth MOID = 1.02191 au   Jupiter MOID = 2.12118 au   T_jup = 3.313  [ 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 14.88   n/a E2021B55   102988 (1999 XC88)          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-Feb-28 20:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin