+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   162 Laurentia Classification: Main-belt Asteroid          SPK-ID: 2000162 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1783920970529402 4.8629e-08   a 3.019284038212573 1.5442e-08 AU q 2.480667627037363 1.488e-07 AU i 6.096677531019697 6.1927e-06 deg node 35.57123013908344 5.3858e-05 deg peri 116.0060891828936 5.6795e-05 deg M 74.84599141220188 1.8701e-05 deg tp 2456002.098992395059 (2012-Mar-15.59899240) 9.8837e-05 JED period 1916.259775996457 5.25 1.4701e-05 4.025e-08 d yr n .1878659691704897 1.4412e-09 deg/d Q 3.557900449387784 1.8196e-08 AU   Orbit Determination Parameters    # obs. used (total)      1239      data-arc span      40524 days (110.95 yr)      first obs. used      1902-04-07      last obs. used      2013-03-19      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .56252      data source      ORB      producer      Otto Matic      solution date      2013-Mar-29 14:28:18   Additional Information  Earth MOID = 1.49841 AU   T_jup = 3.214  [ 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 8.83 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12 diameter diameter 99.10 km 2.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12 rotation period rot_per 11.8686 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Piironen, J.; Bowell, E.; Erikson, A.; Magnusson, P. (1994) Astron. Astrophys. Suppl. Ser. 106, 587-595.] [Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Oey, J.; Krajewski, R. (2008) Minor Planet Bul. 35, 47-48.] [Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] geometric albedo albedo 0.0529   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12 B-V BV .747 mag .044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=4.08, mean=7.16, max.=10.96) deg. U-B UB .374 mag .045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=4.08, mean=7.16, max.=10.96) deg. Tholen spectral type spec_T STU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices SMASSII spectral type spec_B Ch   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) 162 Laurentia          Discovered 1876-Apr-21 by Henry, Prosper at Paris In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul. Note: "planet" implies "minor planet" 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 15:13 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin