+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21778 Andrewarren (1999 RF225) Classification: Main-belt Asteroid          SPK-ID: 2021778 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1259840098368449 3.669e-08   a 2.414760810172842 7.2741e-09 au q 2.110539560510399 8.7485e-08 au i 1.451558736397001 4.1334e-06 deg node 159.4920186458485 0.00012726 deg peri 346.8267006305169 0.00012827 deg M 105.1525786621402 1.5055e-05 deg tp 2458800.161800237552 (2019-Nov-12.66180024) 5.7113e-05 TDB period 1370.596458481066 3.75 6.1931e-06 1.696e-08 d yr n .2626593683154282 1.1868e-09 deg/d Q 2.718982059835285 8.1906e-09 au   Orbit Determination Parameters    # obs. used (total)      1672      data-arc span      10071 days (27.57 yr)      first obs. used      1992-12-17      last obs. used      2020-07-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49693      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:53:14   Additional Information  Earth MOID = 1.12224 au   Jupiter MOID = 2.28191 au   T_jup = 3.506  [ 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 14.93   n/a E2021B10   21778 Andrewarren           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Andrew David Warren (b. 1989) was awarded second place in the 2005 Intel International Science and Engineering Fair for his microbiology project. He attends the Lake Highland Preparatory School, Orlando, Florida, 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: 20050822/MPCPages.arc Last Updated: 2005-08-26 Alternate Designations  1999 RF225 = 1992 YX2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 11:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin