+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   30718 Records (1955 RB1) Classification: Main-belt Asteroid          SPK-ID: 2030718 [ 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 .3171968881690838 6.7877e-08   a 2.763984150434646 1.1552e-08 AU q 1.887256978968107 1.8907e-07 AU i 5.294638421444984 7.4935e-06 deg node 278.326613173239 7.229e-05 deg peri 54.84616648274191 7.3025e-05 deg M 202.3299297464287 1.038e-05 deg tp 2457135.603532486184 (2015-Apr-23.10353249) 5.0455e-05 JED period 1678.424264474709 4.60 1.0523e-05 2.881e-08 d yr n .2144868896498395 1.3447e-09 deg/d Q 3.640711321901184 1.5217e-08 AU   Orbit Determination Parameters    # obs. used (total)      738      data-arc span      21023 days (57.56 yr)      first obs. used      1955-09-14      last obs. used      2013-04-05      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .586      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:55:42   Additional Information  Earth MOID = .882605 AU   T_jup = 3.259  [ 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 18517)   30718 Records           Discovered 1955 Sept. 14 at the Goethe Link Observatory, Indiana University. Brenda Records (b. 1946) served the Indiana University Astronomy Department for more than 20 years. Her personal warmth and Hoosier spirit helped generations of graduate students complete their degrees and made the department a home-away-from-home for faculty, students, staff and visitors. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20071124/MPCPages.arc Last Updated: 2007-11-26 [ show close-approach data ] Alternate Designations  1955 RB1 = 1955 TJ = 1964 PH = 1978 VN13 = 2001 KW67  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-21 14:18 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin