+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17958 Schoof (1999 JE33) Classification: Main-belt Asteroid          SPK-ID: 2017958 [ 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 .03893766408027097 3.2797e-08   a 2.403942226797611 8.5023e-09 au q 2.310338331902187 8.1249e-08 au i 1.703328173952083 3.7904e-06 deg node 148.9339064137936 0.00013043 deg peri 343.2335819884999 0.00014194 deg M 16.81163371388711 5.5362e-05 deg tp 2459136.924192566285 (2020-Oct-14.42419257) 0.00020931 TDB period 1361.395987186629 3.73 7.2225e-06 1.977e-08 d yr n .264434450658219 1.4029e-09 deg/d Q 2.497546121693035 8.8333e-09 au   Orbit Determination Parameters    # obs. used (total)      1519      data-arc span      14916 days (40.84 yr)      first obs. used      1980-03-16      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49643      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:36:06   Additional Information  Earth MOID = 1.32438 au   Jupiter MOID = 2.49368 au   T_jup = 3.522  [ hide covariance matrix ] Orbital Elements at Epoch 2456682.5 (2014-Jan-25.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .038049310416585 3.2879e-08   q 2.312003856513324 8.1324e-08 au tp 2456414.350851259044 (2013-May-01.85085126) 0.0002128 TDB node 148.9651471171205 0.00013047 deg peri 343.2407502701864 0.0001425 deg i 1.702958723261878 3.7913e-06 deg   Orbit Determination Parameters    # obs. used (total)      1519      data-arc span      14916 days (40.84 yr)      first obs. used      1980-03-16      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49643      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:36:06   Additional Information  Jupiter MOID = 2.49368 au   T_jup = 3.522  Orbit Covariance (6×6)   e q tp node peri i e 1.081041756816669E-15 -2.661249570328593E-15 1.842843274560343E-12 -1.036263806565917E-14 5.214927874001287E-13 8.257192007422278E-17 q -2.661249570328593E-15 6.613543079456673E-15 -4.310297254269404E-12 2.593118283344766E-14 -1.221100946551429E-12 -1.443888626909927E-16 tp 1.842843274560343E-12 -4.310297254269404E-12 4.528220462779521E-8 -8.40887423096721E-11 1.220867850149255E-8 6.883062403266263E-13 node -1.036263806565917E-14 2.593118283344766E-14 -8.40887423096721E-11 1.702261505651785E-8 -1.70372365282621E-8 1.551887563991018E-10 peri 5.214927874001287E-13 -1.221100946551429E-12 1.220867850149255E-8 -1.70372365282621E-8 2.030566906254977E-8 -1.54928852622831E-10 i 8.257192007422278E-17 -1.443888626909927E-16 6.883062403266263E-13 1.551887563991018E-10 -1.54928852622831E-10 1.437358224688184E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.03   n/a E2021B10   diameter diameter 2.244 km 0.548 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.345   0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17958 Schoof           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Jenna Marie Schoof (b. 1987) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for her medicine and health project. She attends the Merlo Station High School, Beaverton, Oregon, 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 Alternate Designations  1999 JE33 = 1980 FG3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-03 03:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin