+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   30850 Vonsiemens (1991 TN2) Classification: Main-belt Asteroid          SPK-ID: 2030850 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ 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 .1936838929372089 1.1176e-07   a 2.764053477353243 2.9305e-08 AU q 2.228700839572837 3.1855e-07 AU i 9.10336161155247 1.0997e-05 deg node 349.1751024296896 3.842e-05 deg peri 202.1078320683337 4.2442e-05 deg M 67.79283323203624 1.8304e-05 deg tp 2456084.418285387722 (2012-Jun-05.91828539) 8.4423e-05 JED period 1678.487412835369 4.60 2.6694e-05 7.308e-08 d yr n .2144788201848195 3.4109e-09 deg/d Q 3.299406115133648 3.4981e-08 AU   Orbit Determination Parameters    # obs. used (total)      742      data-arc span      9319 days (25.51 yr)      first obs. used      1987-10-02      last obs. used      2013-04-07      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .54624      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:56:07   Additional Information  Earth MOID = 1.23254 AU   T_jup = 3.295  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.7 mag n/a PDS3 (MPO 18560)   30850 Vonsiemens           Discovered 1991 Oct. 7 by F. Borngen and L. D. Schmadel at Tautenburg. German inventor Werner von Siemens (1816-1892) played an important role in the development of telegraphy. He invented the dynamo and built the world's first electric train and streetcar. He was the founder of electrotechnology and the electric power engineering. 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 [ show close-approach data ] Alternate Designations  1991 TN2 = 1989 EW10 = 2000 QU83  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-23 02:39 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin