+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   6455 (1992 HE) Classification: Apollo [NEO]          SPK-ID: 2006455 [ 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 176 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5721360981297731 2.7263e-08   a 2.241120956833802 5.7621e-09 AU q .9588947571540472 6.1008e-08 AU i 37.35293429587073 1.3591e-05 deg node 27.15459388055915 7.9736e-06 deg peri 262.595158845871 1.2747e-05 deg M 75.93159778271364 8.5612e-06 deg tp 2456142.026270210425 (2012-Aug-02.52627021) 2.8387e-05 JED period 1225.452189094203 3.36 4.7261e-06 1.294e-08 d yr n .2937691108668181 1.133e-09 deg/d Q 3.523347156513558 9.0589e-09 AU   Orbit Determination Parameters    # obs. used (total)      994      data-arc span      8566 days (23.45 yr)      first obs. used      1989-09-29      last obs. used      2013-03-13      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .45783      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 15:43:56   Additional Information  Earth MOID = .289305 AU   T_jup = 3.178  [ 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 13.8 mag n/a PDS3 (MPC 28115)   rotation period rot_per 2.736 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: [Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Gaftonyuk, N.M.; Krugly, Yu.N. (2004) Astronomical School Report 5, No. 1-2, 122-125 (in Russian).] [Wolters, S.D.; Green, S.F.; McBride, N.; Davies, J.K. (2005) Icarus 175, 92-110.] [Skiff, B.A. (2012) Posting on CALL web site. http://www.minorplanet.info/call.html] [Linder, T.; Sampson, R.; Holmes, R. (2013) Minor Planet Bul. 40, 4-6.] SMASSII spectral type spec_B S   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) 6455 (1992 HE)          Discovered 1992-Apr-25 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-24 06:24 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin