+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103228 (1999 YT13) Classification: Main-belt Asteroid          SPK-ID: 2103228 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ 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 .04188506175525789 3.8704e-08   a 2.233891104511216 8.1522e-09 au q 2.140324437644243 8.7739e-08 au i 3.41032351675704 3.8963e-06 deg node 315.3112185795658 6.7902e-05 deg peri 219.1344947947506 8.5152e-05 deg M 46.06783250875208 4.9634e-05 deg tp 2459044.441760469276 (2020-Jul-13.94176047) 0.00016821 TDB period 1219.52701422163 3.34 6.6756e-06 1.828e-08 d yr n .2951964128730449 1.6159e-09 deg/d Q 2.32745777137819 8.4936e-09 au   Orbit Determination Parameters    # obs. used (total)      1116      data-arc span      7465 days (20.44 yr)      first obs. used      1999-12-31      last obs. used      2020-06-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52812      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:50:01   Additional Information  Earth MOID = 1.14548 au   Jupiter MOID = 2.64012 au   T_jup = 3.636  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.96   n/a E2021B55   diameter diameter 1.798 km 0.370 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.287   0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103228 (1999 YT13)          Discovered 1999-Dec-31 by Korlevic, K. at Visnjan Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-04 23:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin