+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   305637 (2009 BG31) Classification: Main-belt Asteroid          SPK-ID: 2305637 [ 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 .2044513328826841 4.8834e-08   a 2.399312487859091 2.1456e-08 au q 1.908769851714231 1.2234e-07 au i 2.621543456383025 8.2927e-06 deg node 83.99368119189251 0.00012538 deg peri 259.9598064408749 0.00012724 deg M 203.0162920069989 2.5043e-05 deg tp 2459792.444147026486 (2022-Jul-31.94414703) 9.9601e-05 TDB period 1357.465023943987 3.72 1.8209e-05 4.985e-08 d yr n .2652002030623624 3.5574e-09 deg/d Q 2.889855124003951 2.5843e-08 au   Orbit Determination Parameters    # obs. used (total)      148      data-arc span      7558 days (20.69 yr)      first obs. used      1999-05-16      last obs. used      2020-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .6266      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 19:11:16   Additional Information  Earth MOID = .901413 au   Jupiter MOID = 2.52048 au   T_jup = 3.497  [ 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 17.5   n/a MPO455251   305637 (2009 BG31)          Discovered 2009-Jan-16 by Spacewatch at Kitt Peak Reference: 20111110/Numbers.arc Last Updated: 2011-11-14 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-08 00:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin