+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1584883896818643 3.3046e-08   a 2.212871547002694 7.2681e-09 au q 1.862157098945421 7.5658e-08 au i 5.44259108785943 3.4031e-06 deg node 250.3685003714857 3.599e-05 deg peri 20.95162180282682 3.7629e-05 deg M 308.1807890606082 1.0864e-05 deg tp 2459569.569695171243 (2021-Dec-21.06969517) 3.6438e-05 TDB period 1202.355055821286 3.29 5.9236e-06 1.622e-08 d yr n .2994123892580937 1.4751e-09 deg/d Q 2.563585995059967 8.42e-09 au   Orbit Determination Parameters    # obs. used (total)      1231      data-arc span      12161 days (33.30 yr)      first obs. used      1988-02-21      last obs. used      2021-06-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51029      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 05:11:45   Additional Information  Earth MOID = .847131 au   Jupiter MOID = 2.52577 au   T_jup = 3.633  [ 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 15.45   n/a MPCxxxxx   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 Alternate Designations  1999 TR150 = 1988 DY2 = 1996 XS28 = 1998 FP96  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-31 07:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin