+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21537 Frechet (1998 PQ) Classification: Main-belt Asteroid          SPK-ID: 2021537 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1399562863430322 3.4521e-08   a 3.071904082099235 1.7397e-08 au q 2.641971794766625 1.0457e-07 au i 1.174264709646373 5.1575e-06 deg node 160.8311798209398 0.00017095 deg peri 78.54711697222567 0.00017192 deg M 168.827138889398 1.9444e-05 deg tp 2458474.247877855895 (2018-Dec-21.74787786) 0.00010366 TDB period 1966.572235695972 5.38 1.6705e-05 4.574e-08 d yr n .1830596372030014 1.555e-09 deg/d Q 3.501836369431845 1.9831e-08 au   Orbit Determination Parameters    # obs. used (total)      1240      data-arc span      10008 days (27.40 yr)      first obs. used      1993-09-18      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54421      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:47:40   Additional Information  Earth MOID = 1.63036 au   Jupiter MOID = 1.50315 au   T_jup = 3.215  [ 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 14.2   n/a MPO309322   21537 Fréchet           Discovered 1998 Aug. 15 by P. G. Comba at Prescott. Maurice Fréchet (1878-1973), a student of Hadamard and graduate of the École Normale Supérieure, was a pioneer in the study of the point set topology of abstract spaces and of functionals defined thereon. He introduced, among others, the concepts of compactness, completeness and separability. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010509/MPCPages.arc Last Updated: 2016-11-23 [ show close-approach data ] Alternate Designations  1998 PQ = 1996 DR3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-31 07:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin