+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   10967 Billallen (4349 T-1) Classification: Main-belt Asteroid          SPK-ID: 2010967 [ 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 .3114771048676549 6.8532e-08   a 2.769178436821377 2.8569e-08 AU q 1.906642754458316 1.9102e-07 AU i 8.99790007769764 8.0848e-06 deg node 158.3801274999767 4.0831e-05 deg peri 191.14541144717 4.2738e-05 deg M 255.8912557450983 1.9237e-05 deg tp 2456887.254018887349 (2014-Aug-17.75401889) 9.6208e-05 JED period 1683.157817852512 4.61 2.6047e-05 7.131e-08 d yr n .2138836870682231 3.3098e-09 deg/d Q 3.631714119184438 3.7467e-08 AU   Orbit Determination Parameters    # obs. used (total)      720      data-arc span      15363 days (42.06 yr)      first obs. used      1971-03-26      last obs. used      2013-04-17      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .585      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:42:26   Additional Information  Earth MOID = .900685 AU   T_jup = 3.248  [ 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 13.3 mag n/a PDS3 (MPC 34814)   10967 Billallen           Discovered 1971 Mar. 26 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels. William H. Allen (b. 1939), an electrical engineer and amateur astronomer, erected his private observatory with a 0.32-m telescope in Rapaura, New Zealand. He has participated in photometric campaigns on cataclysmic variables, notably \eta Carinae, as well as on stellar occultations by minor planets. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20060219/MPCPages.arc Last Updated: 2010-06-03 [ show close-approach data ] Alternate Designations  4349 T-1 = 1977 RJ8  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-18 15:58 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin