+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21856 Heathermaria (1999 TR150) Classification: Main-belt Asteroid          SPK-ID: 2021856 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1585191619031109 3.5396e-08   a 2.21320615943531 7.8743e-09 au q 1.862370573922822 7.9854e-08 au i 5.442481355297941 4.1086e-06 deg node 250.3750887668102 3.664e-05 deg peri 20.8921617953497 3.8412e-05 deg M 249.5599469585844 1.0859e-05 deg tp 2459569.439655541900 (2021-Dec-20.93965554) 3.6523e-05 TDB period 1202.627781655232 3.29 6.4182e-06 1.757e-08 d yr n .2993444900337454 1.5975e-09 deg/d Q 2.564041744947799 9.1225e-09 au   Orbit Determination Parameters    # obs. used (total)      1030      data-arc span      12021 days (32.91 yr)      first obs. used      1988-02-21      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53037      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:54:45   Additional Information  Earth MOID = .84563 au   Jupiter MOID = 2.52635 au   T_jup = 3.633  [ 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 15.42   n/a E2021B10   21856 Heathermaria           Discovered 1999 Oct. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Heather Maria Foster (b. 1990) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her botany & zoology project. She attends the Citrus Springs Middle School, Citrus Springs, Florida. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20051019/MPCPages.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 TR150 = 1988 DY2 = 1996 XS28 = 1998 FP96  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 20:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin