+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21331 Lodovicoferrari (1997 BO) Classification: Main-belt Asteroid          SPK-ID: 2021331 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2267086636323082 3.7012e-08   a 2.57133372136726 1.3173e-08 au q 1.988390089643398 9.2181e-08 au i 5.279514575351754 5.3666e-06 deg node 324.4416383355473 6.5627e-05 deg peri 317.5788739549923 6.7496e-05 deg M 213.1477086820693 1.7478e-05 deg tp 2460010.847819649013 (2023-Mar-07.34781965) 7.4755e-05 TDB period 1506.038571743009 4.12 1.1574e-05 3.169e-08 d yr n .2390377024562891 1.8369e-09 deg/d Q 3.154277353091121 1.616e-08 au   Orbit Determination Parameters    # obs. used (total)      1023      data-arc span      8819 days (24.15 yr)      first obs. used      1997-01-17      last obs. used      2021-03-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49304      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:43:32   Additional Information  Earth MOID = .975566 au   Jupiter MOID = 2.02721 au   T_jup = 3.387  [ 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 15.08   n/a MPCxxxxx   diameter diameter 2.788 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.300   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21331 Lodovicoferrari           Discovered 1997 Jan. 17 by P. G. Comba at Prescott. Lodovico Ferrari (1522-1565), assistant and protégé of Cardano and lecturer in mathematics in Milan, discovered the solution of the quartic algebraic equation. 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: 2009-05-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-31 07:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin