+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18698 Racharles (1998 HX39) Classification: Main-belt Asteroid          SPK-ID: 2018698 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09928471275675126 3.0754e-08   a 2.421822629417361 9.4106e-09 au q 2.181372665307858 7.5071e-08 au i 2.985420027587867 3.7124e-06 deg node 52.64881388134434 6.3423e-05 deg peri 70.07179352894296 6.6078e-05 deg M 125.1182535266974 1.8708e-05 deg tp 2458918.057116559110 (2020-Mar-09.55711656) 7.0925e-05 TDB period 1376.613189393412 3.77 8.0238e-06 2.197e-08 d yr n .2615113691876145 1.5243e-09 deg/d Q 2.662272593526864 1.0345e-08 au   Orbit Determination Parameters    # obs. used (total)      1121      data-arc span      15951 days (43.67 yr)      first obs. used      1977-10-16      last obs. used      2021-06-18      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51274      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 04:39:56   Additional Information  Earth MOID = 1.19975 au   Jupiter MOID = 2.38565 au   T_jup = 3.504  [ 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 15.40   n/a E2021B10   18698 Racharles           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Rachael Ann Charles (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for her botany team project. She attends the Salpointe Catholic High School, Tucson, Arizona, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20040830/MPCPages.arc Last Updated: 2004-09-06 Alternate Designations  1998 HX39 = 1997 BG2 = 3020 T-3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-01 22:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin