+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08502958102971886 3.7373e-08   a 2.792366304635959 9.9562e-09 au q 2.554932567671259 1.0307e-07 au i 4.281512564259023 3.8691e-06 deg node 340.0802524623168 3.9237e-05 deg peri 4.271110029539379 4.3357e-05 deg M 106.8131431789736 1.7747e-05 deg tp 2458694.816009562600 (2019-Jul-30.31600956) 8.3755e-05 TDB period 1704.343034381375 4.67 9.1153e-06 2.496e-08 d yr n .2112250836467726 1.1297e-09 deg/d Q 3.029800041600659 1.0803e-08 au   Orbit Determination Parameters    # obs. used (total)      2071      data-arc span      10774 days (29.50 yr)      first obs. used      1991-09-11      last obs. used      2021-03-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46161      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:13:59   Additional Information  Earth MOID = 1.54532 au   Jupiter MOID = 2.31486 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 13.78   n/a E2021B10   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 ] 2021-Apr-16 12:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin