+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   180209 (2003 SF312) Classification: Main-belt Asteroid          SPK-ID: 2180209 [ 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 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1090840698191837 3.7886e-08   a 2.19435373582266 9.6757e-09 au q 1.954984699696194 8.4332e-08 au i 4.527839040318304 5.079e-06 deg node 34.65196960610204 5.0789e-05 deg peri 35.66646244084789 5.6581e-05 deg M 57.98336116751708 2.5432e-05 deg tp 2459009.268570960387 (2020-Jun-08.76857096) 8.3371e-05 TDB period 1187.294304229255 3.25 7.8528e-06 2.15e-08 d yr n .3032104160844079 2.0054e-09 deg/d Q 2.433722771949125 1.0731e-08 au   Orbit Determination Parameters    # obs. used (total)      307      data-arc span      7420 days (20.31 yr)      first obs. used      2000-11-20      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56819      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:25:35   Additional Information  Earth MOID = .970492 au   Jupiter MOID = 2.79174 au   T_jup = 3.658  [ 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 17.4   n/a MPO440013   180209 (2003 SF312)          Discovered 2003-Sep-30 by Spacewatch at Kitt Peak Reference: 20080321/Numbers.arc Last Updated: 2008-03-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 10:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin