+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2268389261258451 3.7044e-08   a 2.571092056753177 1.3151e-08 au q 1.987868295628596 9.2263e-08 au i 5.279471783354714 5.389e-06 deg node 324.4421832746939 6.6039e-05 deg peri 317.5564342151606 6.7913e-05 deg M 166.3292148591499 1.742e-05 deg tp 2458504.769722991895 (2019-Jan-21.26972299) 7.1451e-05 TDB period 1505.82626109919 4.12 1.1553e-05 3.163e-08 d yr n .2390714050485579 1.8343e-09 deg/d Q 3.154315817877758 1.6134e-08 au   Orbit Determination Parameters    # obs. used (total)      1015      data-arc span      8766 days (24.00 yr)      first obs. used      1997-01-17      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49445      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:52:04   Additional Information  Earth MOID = .973416 au   Jupiter MOID = 2.02815 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 15.07   n/a E2021B10   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-Apr-10 13:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin