+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103197 (1999 XZ247) Classification: Main-belt Asteroid          SPK-ID: 2103197 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2595345142009195 3.9994e-08   a 2.787630139467174 1.3802e-08 au q 2.06414390544872 1.1165e-07 au i 5.81739263887362 5.1498e-06 deg node 128.7261851933462 4.4323e-05 deg peri 32.49784732626093 4.536e-05 deg M 88.61982047008121 9.1081e-06 deg tp 2458582.015363128503 (2019-Apr-08.51536313) 4.2099e-05 TDB period 1700.008739293271 4.65 1.2626e-05 3.457e-08 d yr n .2117636172562616 1.5727e-09 deg/d Q 3.511116373485629 1.7384e-08 au   Orbit Determination Parameters    # obs. used (total)      619      data-arc span      7498 days (20.53 yr)      first obs. used      1999-12-06      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50431      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:50:11   Additional Information  Earth MOID = 1.07573 au   Jupiter MOID = 1.48195 au   T_jup = 3.273  [ 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 15.54   n/a E2021B55   diameter diameter 2.165 km 0.552 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.261   0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103197 (1999 XZ247)          Discovered 1999-Dec-06 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 XZ247 = 2001 KT16  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 20:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin