+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15959 (1998 BQ40) Classification: Main-belt Asteroid          SPK-ID: 2015959 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08496098459411908 4.0938e-08   a 2.791744458218751 1.0677e-08 au q 2.55455510031331 1.1462e-07 au i 4.281468019242163 4.5442e-06 deg node 340.0849202133288 4.0533e-05 deg peri 4.123697384370648 4.497e-05 deg M 64.71240065794412 1.8316e-05 deg tp 2458694.235308143857 (2019-Jul-29.73530814) 8.6705e-05 TDB period 1703.773742701918 4.66 9.7744e-06 2.676e-08 d yr n .2112956614938181 1.2122e-09 deg/d Q 3.028933816124192 1.1584e-08 au   Orbit Determination Parameters    # obs. used (total)      1759      data-arc span      10557 days (28.90 yr)      first obs. used      1991-09-11      last obs. used      2020-08-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47986      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 01:03:07   Additional Information  Earth MOID = 1.54674 au   Jupiter MOID = 2.31551 au   T_jup = 3.319  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.8   n/a MPO328867   diameter diameter 5.767 km 0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.211   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15959 (1998 BQ40)          Discovered 1998-Jan-24 by JPL/GEODSS NEAT at Haleakala Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 BQ40 = 1991 RB15  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-28 01:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin