+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   118291 (1998 SU46) Classification: Main-belt Asteroid          SPK-ID: 2118291 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2462313800773324 3.2602e-08   a 2.315795046133732 6.8773e-09 au q 1.745573635947973 7.6705e-08 au i 2.936273462078636 4.628e-06 deg node 24.27484997922375 6.5368e-05 deg peri 89.65904926013438 6.6068e-05 deg M 349.5153679972102 9.4957e-06 deg tp 2459037.988606621526 (2020-Jul-07.48860662) 3.4023e-05 TDB period 1287.207636868748 3.52 5.734e-06 1.57e-08 d yr n .2796751586059057 1.2458e-09 deg/d Q 2.88601645631949 8.5707e-09 au   Orbit Determination Parameters    # obs. used (total)      818      data-arc span      7801 days (21.36 yr)      first obs. used      1998-09-25      last obs. used      2020-02-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53965      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 05:56:19   Additional Information  Earth MOID = .765013 au   Jupiter MOID = 2.2338 au   T_jup = 3.538  [ 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 16.1   n/a MPO453653   diameter diameter 1.564 km 0.195 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.315   0.195 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   118291 (1998 SU46)          Discovered 1998-Sep-25 by Spacewatch at Kitt Peak Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ show close-approach data ] Alternate Designations  1998 SU46 = 2001 QD331 = 2003 AT59  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-29 18:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin