+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   137052 Tjelvar (1998 VO33) Classification: Apollo [NEO]          SPK-ID: 2137052 [ 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 130 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .8096075766781095 4.5303e-08   a 1.248054737410545 5.0215e-09 AU q .2376201658939594 5.6854e-08 AU i 14.93267286478175 9.2791e-06 deg node 64.36687304531787 1.2204e-05 deg peri 209.815907929577 1.386e-05 deg M 164.0043154936881 1.6614e-05 deg tp 2456168.492699071771 (2012-Aug-28.99269907) 2.2426e-05 JED period 509.270918162986 1.39 3.0735e-06 8.415e-09 d yr n .7068929074107985 4.2662e-09 deg/d Q 2.25848930892713 9.0869e-09 AU   Orbit Determination Parameters    # obs. used (total)      733      data-arc span      5197 days (14.23 yr)      first obs. used      1998-11-15      last obs. used      2013-02-06      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .59801      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 15:46:17   Additional Information  Earth MOID = .0689464 AU   T_jup = 4.725  [ 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 16.853 mag .53028 130 autocmod 2.5c rotation period rot_per 9.02 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html] SMASSII spectral type spec_B V   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 137052 Tjelvar           Discovered 1998 Nov. 15 by C.-I. Lagerkvist at the European Southern Observatory. According to the 13th-century Gutnic saga, Tjelvar was the first inhabitant of Gotland. By making a fire, he prevented the island from disappearing into the sea during the night. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20110218/MPCPages.arc Last Updated: 2011-02-22 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-19 12:06 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin