+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2462089796656681 3.1959e-08   a 2.315663463239787 6.8604e-09 au q 1.745526324706452 7.5106e-08 au i 2.936361488817508 4.6278e-06 deg node 24.27112837839305 6.4919e-05 deg peri 89.63932861613974 6.5619e-05 deg M 45.46806515437832 9.6055e-06 deg tp 2459037.939298470567 (2020-Jul-07.43929847) 3.4023e-05 TDB period 1287.09793020433 3.52 5.7198e-06 1.566e-08 d yr n .2796989969076005 1.243e-09 deg/d Q 2.885800601773122 8.5495e-09 au   Orbit Determination Parameters    # obs. used (total)      822      data-arc span      8157 days (22.33 yr)      first obs. used      1998-09-25      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .542      source      ORB      producer      Otto Matic      solution date      2021-Feb-23 21:39:13   Additional Information  Earth MOID = .76486 au   Jupiter MOID = 2.23383 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 16.16   n/a E2021B55   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 ] 2021-Apr-13 05:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin