+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100986 (1998 QB33) Classification: Main-belt Asteroid          SPK-ID: 2100986 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1709372940734821 4.4849e-08   a 2.329100215334899 9.0146e-09 au q 1.930970126899586 1.0601e-07 au i 2.207301508855961 5.0168e-06 deg node 216.0962002140394 0.00013946 deg peri 84.94502116631398 0.00014036 deg M 67.94527038857765 1.6008e-05 deg tp 2458755.459753507315 (2019-Sep-28.95975351) 5.7288e-05 TDB period 1298.316839904671 3.55 7.5376e-06 2.064e-08 d yr n .2772820847231966 1.6098e-09 deg/d Q 2.727230303770211 1.0556e-08 au   Orbit Determination Parameters    # obs. used (total)      393      data-arc span      7762 days (21.25 yr)      first obs. used      1998-08-17      last obs. used      2019-11-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .6439      source      ORB      producer      Otto Matic      solution date      2019-Dec-14 08:36:36   Additional Information  Earth MOID = .917001 au   Jupiter MOID = 2.48759 au   T_jup = 3.551  [ 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 16.5   n/a MPO436470   diameter diameter 2.806 km 0.241 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.047   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100986 (1998 QB33)          Discovered 1998-Aug-17 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 QB33 = 2001 HO51  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-23 22:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin