+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1598895621597462 3.2274e-08   a 2.305865143827285 7.6388e-09 au q 1.93718137558132 7.7067e-08 au i 4.641746527289813 3.3942e-06 deg node 53.31180028074556 5.9768e-05 deg peri 359.4493097506301 6.1835e-05 deg M 26.67090629373822 1.6592e-05 deg tp 2459301.748835479690 (2021-Mar-28.24883548) 5.8822e-05 TDB period 1278.937387865217 3.50 6.3552e-06 1.74e-08 d yr n .2814836781031999 1.3987e-09 deg/d Q 2.67454891207325 8.8602e-09 au   Orbit Determination Parameters    # obs. used (total)      1430      data-arc span      8833 days (24.18 yr)      first obs. used      1996-12-06      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53466      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 18:32:31   Additional Information  Earth MOID = .947776 au   Jupiter MOID = 2.67796 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-Jul-31 07:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin