+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18680 Weirather (1998 FS103) Classification: Main-belt Asteroid          SPK-ID: 2018680 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07608294931605451 3.1696e-08   a 2.364900361452577 8.3136e-09 au q 2.184971767114662 7.3041e-08 au i 6.302462187444911 3.759e-06 deg node 232.7995693322529 3.1279e-05 deg peri 208.8188856649173 4.2757e-05 deg M 186.0213366072745 2.8462e-05 deg tp 2459842.464758573023 (2022-Sep-19.96475857) 0.00010567 TDB period 1328.365838543116 3.64 7.0047e-06 1.918e-08 d yr n .2710096793778058 1.4291e-09 deg/d Q 2.544828955790492 8.9462e-09 au   Orbit Determination Parameters    # obs. used (total)      1578      data-arc span      15206 days (41.63 yr)      first obs. used      1978-11-30      last obs. used      2020-07-18      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51899      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:34:49   Additional Information  Earth MOID = 1.20224 au   Jupiter MOID = 2.63091 au   T_jup = 3.537  [ 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 14.72   n/a E2021B10   diameter diameter 2.853 km 0.430 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.344   0.163 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18680 Weirather           Discovered 1998 Mar. 31 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Sara Jo Weirather (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for her botany project. She attends the Central Lee High School, Donnellson, Iowa, 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: 20040830/MPCPages.arc Last Updated: 2004-09-06 Alternate Designations  1998 FS103 = 1978 WL15  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 13:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin