+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101558 (1999 AE8) Classification: Main-belt Asteroid          SPK-ID: 2101558 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03535990296590102 4.8645e-08   a 2.514449888655404 1.1072e-08 au q 2.425539184579928 1.1754e-07 au i 11.54443800661095 5.0125e-06 deg node 338.6373162582298 1.7256e-05 deg peri 213.524463943441 6.4235e-05 deg M 77.07927967431429 6.1477e-05 deg tp 2458688.684247927089 (2019-Jul-24.18424793) 0.00024866 TDB period 1456.340422751189 3.99 9.6189e-06 2.634e-08 d yr n .2471949513836332 1.6327e-09 deg/d Q 2.60336059273088 1.1463e-08 au   Orbit Determination Parameters    # obs. used (total)      1838      data-arc span      7948 days (21.76 yr)      first obs. used      1999-01-13      last obs. used      2020-10-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .4963      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:59:52   Additional Information  Earth MOID = 1.43528 au   Jupiter MOID = 2.38313 au   T_jup = 3.431  [ 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 14.0   n/a MPO385427   diameter diameter 9.405 km 0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.053   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101558 (1999 AE8)          Discovered 1999-Jan-13 by Kobayashi, T. at Oizumi Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 AE8 = 2001 QB137  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-27 14:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin