+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100569 (1997 HR) Classification: Main-belt Asteroid          SPK-ID: 2100569 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0577788697333619 4.1372e-08   a 2.548032778035439 1.3224e-08 au q 2.400810324076993 1.0315e-07 au i 4.732394625497915 3.444e-06 deg node 41.43191593687025 5.375e-05 deg peri 265.3099426211649 6.1774e-05 deg M 159.3943011811565 3.0554e-05 deg tp 2458342.726713611231 (2018-Aug-12.22671361) 0.00012547 TDB period 1485.613860377782 4.07 1.1566e-05 3.167e-08 d yr n .2423240719553158 1.8865e-09 deg/d Q 2.695255231993885 1.3988e-08 au   Orbit Determination Parameters    # obs. used (total)      542      data-arc span      8310 days (22.75 yr)      first obs. used      1997-04-28      last obs. used      2020-01-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55255      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 01:07:42   Additional Information  Earth MOID = 1.39167 au   Jupiter MOID = 2.42894 au   T_jup = 3.435  [ 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 15.8   n/a MPO502723   diameter diameter 2.167 km 0.350 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.216   0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100569 (1997 HR)          Discovered 1997-Apr-28 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1997 HR = 2002 PY99  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-25 06:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin