+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74427 (1999 BU2) Classification: Inner Main-belt Asteroid          SPK-ID: 2074427 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04700752566344159 4.4814e-08   a 1.908680322775566 6.373e-09 au q 1.818957983519387 8.7315e-08 au i 23.98625388947503 5.3186e-06 deg node 121.0300902846257 9.1101e-06 deg peri 21.25033242745388 6.5409e-05 deg M 30.00570536733271 6.0434e-05 deg tp 2458920.221442352758 (2020-Mar-11.72144235) 0.00016184 TDB period 963.159519138349 2.64 4.8239e-06 1.321e-08 d yr n .3737698614265467 1.872e-09 deg/d Q 1.998402662031744 6.6726e-09 au   Orbit Determination Parameters    # obs. used (total)      887      data-arc span      7804 days (21.37 yr)      first obs. used      1998-12-17      last obs. used      2020-04-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50027      source      ORB      producer      Otto Matic      solution date      2020-May-20 14:05:09   Additional Information  Earth MOID = .839031 au   Jupiter MOID = 3.0707 au   T_jup = 3.832  [ 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 15.6   n/a MPO319937   74427 (1999 BU2)          Discovered 1999-Jan-18 by Kobayashi, T. at Oizumi Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-15 18:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin