+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04909869099081166 3.7885e-08   a 3.204688319036231 2.6915e-08 au q 3.047342317538007 1.3011e-07 au i 21.31182902749606 5.453e-06 deg node 348.447670965564 1.1282e-05 deg peri 277.8779883160558 6.1589e-05 deg M 34.75789681232084 6.191e-05 deg tp 2458998.184986770389 (2020-May-28.68498677) 0.00036025 TDB period 2095.44913364385 5.74 2.6398e-05 7.227e-08 d yr n .1718008775397871 2.1643e-09 deg/d Q 3.362034320534455 2.8236e-08 au   Orbit Determination Parameters    # obs. used (total)      1258      data-arc span      15003 days (41.08 yr)      first obs. used      1979-06-15      last obs. used      2020-07-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49841      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:06:03   Additional Information  Earth MOID = 2.10973 au   Jupiter MOID = 1.78958 au   T_jup = 3.084  [ 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 13.21   n/a E2021B10   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 ] 2021-Apr-17 10:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin