+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17914 Joannelee (1999 FA54) Classification: Main-belt Asteroid          SPK-ID: 2017914 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1391881380693015 2.8776e-08   a 2.408495517381179 8.4713e-09 au q 2.073261510768634 6.988e-08 au i 3.653951826551844 3.1879e-06 deg node 275.6662806086915 5.8854e-05 deg peri 330.188663075423 6.0444e-05 deg M 238.2502844937109 1.5155e-05 deg tp 2459662.224207664312 (2022-Mar-23.72420766) 5.8242e-05 TDB period 1365.265734444906 3.74 7.203e-06 1.972e-08 d yr n .2636849302794301 1.3912e-09 deg/d Q 2.743729523993724 9.6504e-09 au   Orbit Determination Parameters    # obs. used (total)      1539      data-arc span      14500 days (39.70 yr)      first obs. used      1981-07-02      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48924      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:17:40   Additional Information  Earth MOID = 1.05912 au   Jupiter MOID = 2.28454 au   T_jup = 3.505  [ 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 14.8   n/a MPO439217   diameter diameter 2.510 km 0.618 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.370   0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17914 Joannelee           Discovered 1999 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Joanne June Lee (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for her medicine and health team project. She attends the Mira Loma High School, Sacramento, California, 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: 20040614/MPCPages.arc Last Updated: 2009-12-11 [ show close-approach data ] Alternate Designations  1999 FA54 = 1981 NC = 2000 QQ90  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 12:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin