+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   13720 (1998 QU50) Classification: Outer Main-belt Asteroid          SPK-ID: 2013720 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04833270483598603 3.8212e-08   a 3.202554650231439 2.6302e-08 au q 3.047766521600688 1.3061e-07 au i 21.29947099916699 5.473e-06 deg node 348.508181637541 1.1337e-05 deg peri 278.0905915745938 6.2835e-05 deg M .1627735791670704 6.3234e-05 deg tp 2458999.553491183810 (2020-May-30.05349118) 0.0003677 TDB period 2093.356769397352 5.73 2.5789e-05 7.061e-08 d yr n .1719725969614052 2.1186e-09 deg/d Q 3.357342778862189 2.7574e-08 au   Orbit Determination Parameters    # obs. used (total)      1230      data-arc span      14929 days (40.87 yr)      first obs. used      1979-06-15      last obs. used      2020-04-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49388      source      ORB      producer      Otto Matic      solution date      2020-May-20 03:54:53   Additional Information  Earth MOID = 2.11113 au   Jupiter MOID = 1.79282 au   T_jup = 3.085  [ 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 13.2   n/a MPO473953   diameter diameter 12.314 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.081   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   13720 (1998 QU50)          Discovered 1998-Aug-17 by LINEAR at Socorro Reference: 20000222/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 QU50 = 1990 EG10  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-23 09:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin