+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21307 (1996 XG3) Classification: Main-belt Asteroid          SPK-ID: 2021307 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1598010647809164 3.2288e-08   a 2.305635626551967 7.6935e-09 au q 1.937192598432147 7.7126e-08 au i 4.641870075820068 3.3982e-06 deg node 53.31239151860161 6.0555e-05 deg peri 359.4268017027875 6.2649e-05 deg M 331.5116437709493 1.6682e-05 deg tp 2459301.692733762233 (2021-Mar-28.19273376) 5.9384e-05 TDB period 1278.746441581473 3.50 6.4004e-06 1.752e-08 d yr n .2815257100968153 1.4091e-09 deg/d Q 2.674078654671786 8.9229e-09 au   Orbit Determination Parameters    # obs. used (total)      1404      data-arc span      8802 days (24.10 yr)      first obs. used      1996-12-06      last obs. used      2021-01-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53612      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:51:55   Additional Information  Earth MOID = .947441 au   Jupiter MOID = 2.67764 au   T_jup = 3.567  [ 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 15.04   n/a E2021B10   21307 (1996 XG3)          Discovered 1996-Dec-03 by Kobayashi, T. at Oizumi Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 05:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin