+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   30828 Bethe (1990 TK4) Classification: Main-belt Asteroid          SPK-ID: 2030828 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1256634118372877 5.2321e-08   a 2.322792920952149 1.652e-08 AU q 2.030902837513803 1.2238e-07 AU i 2.955305899868328 8.6734e-06 deg node 228.6719555066938 0.00015853 deg peri 237.4979184177089 0.00016519 deg M 65.06621915192331 4.6651e-05 deg tp 2456166.795411989709 (2012-Aug-27.29541199) 0.00016674 JED period 1293.046572865417 3.54 1.3795e-05 3.777e-08 d yr n .2784122455869727 2.9702e-09 deg/d Q 2.614683004390495 1.8597e-08 AU   Orbit Determination Parameters    # obs. used (total)      593      data-arc span      20947 days (57.35 yr)      first obs. used      1955-12-12      last obs. used      2013-04-18      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .57608      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:56:01   Additional Information  Earth MOID = 1.04894 AU   T_jup = 3.564  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.1 mag n/a PDS3 (MPO 18552)   30828 Bethe           Discovered 1990 Oct. 12 by F. Borngen and L. D. Schmadel at Tautenburg. Hans Albrecht Bethe (b. 1906) is a pioneering theoretician in quantum physics, atomic and nuclear processes and solid-state and reactor physics. He emigrated from Germany to the U.S. in 1933. He received the 1967 Nobel Prize in physics for his discoveries concerning the energy production of stars. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020427/MPCPages.arc Last Updated: 2003-10-02 Alternate Designations  1990 TK4 = 1997 TR2  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 00:14 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin