+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   173002 Dorfi (2006 OS) Classification: Main-belt Asteroid          SPK-ID: 2173002 [ 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 .1377173763463201 1.2363e-07   a 2.552462206804041 6.0197e-08 AU q 2.20094380845985 3.1085e-07 AU i 2.764337458152484 1.0176e-05 deg node 35.77954118460652 0.00027843 deg peri 281.9292748208014 0.00028208 deg M 218.5006967839187 6.6927e-05 deg tp 2456985.949187982483 (2014-Nov-24.44918798) 0.00029376 JED period 1489.489367674435 4.08 5.2692e-05 1.443e-07 d yr n .2416935681535439 8.5501e-09 deg/d Q 2.903980605148232 6.8487e-08 AU   Orbit Determination Parameters    # obs. used (total)      157      data-arc span      5347 days (14.64 yr)      first obs. used      1998-08-17      last obs. used      2013-04-07      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .61461      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 20:19:53   Additional Information  Earth MOID = 1.18957 AU   T_jup = 3.424  [ 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 16.007 mag .48769 1 autocmod 2.5c 173002 Dorfi           Discovered 2006 July 17 by W. Ries at Altschwendt. Ernst Dorfi (b. 1956) is a professor of theoretical astrophysics at the University of Vienna and one of the most respected astronomical specialists in Austria. In addition to his research, he promotes astronomy at conventions and on television shows. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20080520/MPCPages.arc Last Updated: 2008-05-22 [ show close-approach data ] Alternate Designations  2006 OS = 2006 ND1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-21 07:55 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin