+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   3753 Cruithne (1986 TO) Classification: Aten [NEO]          SPK-ID: 2003753 [ 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 102 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5147904154357811 4.7988e-07   a .9976840137025875 2.3378e-09 AU q .484085845814995 4.7874e-07 AU i 19.80699728261757 1.2624e-05 deg node 126.2478158791565 9.4494e-05 deg peri 43.81004565163396 9.384e-05 deg M 115.0351512616361 3.5814e-05 deg tp 2456284.190278965779 (2012-Dec-22.69027897) 3.6145e-05 JED period 363.9887383386565 1.00 1.2794e-06 3.503e-09 d yr n .9890415886028172 3.4763e-09 deg/d Q 1.51128218159018 3.5413e-09 AU   Orbit Determination Parameters    # obs. used (total)      561      data-arc span      14252 days (39.02 yr)      first obs. used      1973-10-17      last obs. used      2012-10-24      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .54744      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 15:43:24   Additional Information  Earth MOID = .0713637 AU   T_jup = 5.922  [ 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 15.1 mag n/a PDS3 (MPC 28110)   rotation period rot_per 27.4 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: [Erikson, A.; Mottola, S.; Lagerros, J.S.V.; Lindgren, M.; et al. (2000) Icarus 147, 487-497.] SMASSII spectral type spec_B Q   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) 3753 Cruithne           Discovered 1986 Oct. 10 by J. D. Waldron at Siding Spring. Named for the most common term used by the Irish for the Picts---one of the ancient peoples of Scotland. `Cruithne' was the eponymous ancestor of the Picts, and it was his seven sons who gave their names to the seven divisions of the Pictish Kingdom. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19980411/MPCPages.arc Last Updated: 2009-11-17 [ show close-approach data ] Alternate Designations  1986 TO = 1983 UH  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-20 04:58 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin