+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21700 Caseynicole (1999 RD72) Classification: Main-belt Asteroid          SPK-ID: 2021700 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1517959922666597 4.234e-08   a 2.589155784868189 1.0328e-08 au q 2.196132313371161 1.1028e-07 au i 3.727098014966562 4.7356e-06 deg node 63.79719840272273 6.4996e-05 deg peri 284.3556404689866 6.6733e-05 deg M 35.67785838232028 1.4058e-05 deg tp 2459049.689362314385 (2020-Jul-19.18936231) 5.9525e-05 TDB period 1521.72333285916 4.17 9.1047e-06 2.493e-08 d yr n .2365738845073745 1.4155e-09 deg/d Q 2.982179256365218 1.1895e-08 au   Orbit Determination Parameters    # obs. used (total)      994      data-arc span      10693 days (29.28 yr)      first obs. used      1991-11-04      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51536      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:51:51   Additional Information  Earth MOID = 1.19152 au   Jupiter MOID = 2.43763 au   T_jup = 3.401  [ 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 15.41   n/a E2021B10   21700 Caseynicole           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Casey Nicole McDonald (b. 1986) was awarded second place in the 2005 Intel International Science and Engineering Fair for her zoology project. She attends the Hedgesville High School, Hedgesville, West Virginia, 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 RD72 = 1998 HC85  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 11:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin