+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   30283 (2000 HS57) Classification: Main-belt Asteroid          SPK-ID: 2030283 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1054861113221983 2.8067e-08   a 2.27668433213936 6.7967e-09 au q 2.036525755233803 6.4789e-08 au i 6.800036565449845 3.5142e-06 deg node 60.5533663435861 3.2674e-05 deg peri 226.2590946357243 4.0922e-05 deg M 307.5309851813595 2.7169e-05 deg tp 2459383.374463088654 (2021-Jun-17.87446309) 9.4998e-05 TDB period 1254.73685639942 3.44 5.6187e-06 1.538e-08 d yr n .2869127484092978 1.2848e-09 deg/d Q 2.516842909044918 7.5137e-09 au   Orbit Determination Parameters    # obs. used (total)      1789      data-arc span      9902 days (27.11 yr)      first obs. used      1993-04-15      last obs. used      2020-05-25      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52145      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 06:33:23   Additional Information  Earth MOID = 1.02508 au   Jupiter MOID = 2.59856 au   T_jup = 3.592  [ 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 14.73   n/a E2021B10   diameter diameter 2.451 km 0.230 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.511   0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   30283 (2000 HS57)          Discovered 2000-Apr-24 by LONEOS at Anderson Mesa Reference: 20011002/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2000 HS57 = 1998 XL45  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 15:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin