+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21543 Jessop (1998 QQ24) Classification: Outer Main-belt Asteroid          SPK-ID: 2021543 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05442287811365651 3.9048e-08   a 3.251455502593675 2.4322e-08 au q 3.074501936084042 1.3394e-07 au i 8.631929490825447 4.6177e-06 deg node 309.9108045786901 2.897e-05 deg peri 338.7873336290237 5.5786e-05 deg M 6.344328176962807 4.5589e-05 deg tp 2459358.760313486190 (2021-May-24.26031349) 0.00027133 TDB period 2141.485554657368 5.86 2.4028e-05 6.579e-08 d yr n .1681076013877661 1.8862e-09 deg/d Q 3.428409069103308 2.5645e-08 au   Orbit Determination Parameters    # obs. used (total)      1064      data-arc span      11442 days (31.33 yr)      first obs. used      1990-03-02      last obs. used      2021-06-29      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53889      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 18:34:10   Additional Information  Earth MOID = 2.05982 au   Jupiter MOID = 1.76843 au   T_jup = 3.161  [ 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 13.73   n/a E2021B10   diameter diameter 9.670 km 0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.069   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21543 Jessop           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Forrest Connell Jessop (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his zoology team project. He attends the Corvallis High School, Corvallis, Montana, 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: 20060711/MPCPages.arc Last Updated: 2006-07-17 [ show close-approach data ] Alternate Designations  1998 QQ24 = 1990 EQ1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-27 03:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin