+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102931 (1999 XE41) Classification: Main-belt Asteroid          SPK-ID: 2102931 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2400292728047855 4.3497e-08   a 2.380030304267926 8.1516e-09 au q 1.808753361081144 1.0565e-07 au i 1.984003738307685 4.5517e-06 deg node 338.1716238254738 0.0001009 deg peri 354.2341382444903 0.00010115 deg M 318.3088949363055 8.1241e-06 deg tp 2459355.814879135147 (2021-May-21.31487914) 3.0699e-05 TDB period 1341.133951792112 3.67 6.8901e-06 1.886e-08 d yr n .2684295625496201 1.3791e-09 deg/d Q 2.951307247454709 1.0108e-08 au   Orbit Determination Parameters    # obs. used (total)      945      data-arc span      7557 days (20.69 yr)      first obs. used      1999-10-03      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52705      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:51:45   Additional Information  Earth MOID = .796461 au   Jupiter MOID = 2.42107 au   T_jup = 3.499  [ 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 15.89   n/a E2021B55   diameter diameter 1.495 km 0.220 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.415   0.111 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   102931 (1999 XE41)          Discovered 1999-Dec-07 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1999 XE41 = 2002 JX58  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-04 22:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin