+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7474 (1992 TC) Classification: Amor [NEO]          SPK-ID: 2007474 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2922350149252642 1.2635e-07   a 1.565549614316852 2.7315e-08 AU q 1.108041199410725 2.0114e-07 AU i 7.088328198588735 1.0804e-05 deg node 88.66890991898727 7.9832e-05 deg peri 275.5316169514005 0.00011536 deg M 176.5782658448964 0.00013545 deg tp 2456049.559551520791 (2012-May-02.05955152) 0.00026009 JED period 715.4819470448811 1.96 1.8725e-05 5.127e-08 d yr n .5031573493739288 1.3169e-08 deg/d Q 2.023058029222979 3.5298e-08 AU   Orbit Determination Parameters    # obs. used (total)      255      data-arc span      8243 days (22.57 yr)      first obs. used      1990-08-19      last obs. used      2013-03-14      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .6714      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 15:44:01   Additional Information  Earth MOID = .167391 AU   T_jup = 4.365  [ 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 18.0 mag n/a PDS3 (MPC 29082)   rotation period rot_per 5.540 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: [Pravec, P.; Wolf, M.; Sarounova, L.; Mottola, S.; et al. (1997) Icarus 130, 275-286.] SMASSII spectral type spec_B X   n/a Xu et al. (1995) Icarus 115, 1-35   7474 (1992 TC)          Discovered 1992-Oct-01 by McNaught, R. H. at Siding Spring (413) Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-19 09:10 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin