+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20355 Saraclark (1998 HD146) Classification: Main-belt Asteroid          SPK-ID: 2020355 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1468826057497502 2.5458e-08   a 2.296408876305323 6.0339e-09 au q 1.959106356686742 5.7498e-08 au i 4.595569302170706 2.6744e-06 deg node 139.2241335764075 3.9344e-05 deg peri 53.47464568433588 4.0736e-05 deg M 200.5203683460334 1.0726e-05 deg tp 2459763.586318580086 (2022-Jul-03.08631858) 3.8651e-05 TDB period 1271.078147011692 3.48 5.0097e-06 1.372e-08 d yr n .283224128151649 1.1163e-09 deg/d Q 2.633711395923905 6.9202e-09 au   Orbit Determination Parameters    # obs. used (total)      1958      data-arc span      9860 days (27.00 yr)      first obs. used      1994-01-14      last obs. used      2021-01-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51509      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:17:41   Additional Information  Earth MOID = .962547 au   Jupiter MOID = 2.32473 au   T_jup = 3.576  [ 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 14.99   n/a E2021B10   20355 Saraclark           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Sara Catherine Clark (b. 1990) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her physical science project. She attends the Keystone Junior High School, San Antonio, Texas. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20041028/MPCPages.arc Last Updated: 2004-10-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-17 22:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin