+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .140123970803611 3.4518e-08   a 3.071568522906883 1.7495e-08 au q 2.641168144881789 1.0454e-07 au i 1.174333907339952 5.191e-06 deg node 160.8361180808685 0.00017106 deg peri 78.56191115174123 0.00017204 deg M 132.9102352036112 1.9347e-05 deg tp 2458474.570132713678 (2018-Dec-22.07013271) 0.00010374 TDB period 1966.25001695863 5.38 1.6799e-05 4.599e-08 d yr n .1830896360559698 1.5643e-09 deg/d Q 3.501968900931978 1.9947e-08 au   Orbit Determination Parameters    # obs. used (total)      1232      data-arc span      9947 days (27.23 yr)      first obs. used      1993-09-18      last obs. used      2020-12-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54487      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:53:07   Additional Information  Earth MOID = 1.62781 au   Jupiter MOID = 1.50427 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-Apr-10 20:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin