+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   451 Patientia (1899 EY) Classification: Main-belt Asteroid          SPK-ID: 2000451 [ 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 78 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07654634012147082 4.309e-08   a 3.060069190838776 8.2545e-09 AU q 2.825832093761597 1.3329e-07 AU i 15.24085143112823 5.0683e-06 deg node 89.25683648371952 1.7113e-05 deg peri 337.2717456934529 3.3794e-05 deg M 58.1414477697256 3.0189e-05 deg tp 2456084.724350187428 (2012-Jun-06.22435019) 0.00016353 JED period 1955.218493745849 5.35 7.9113e-06 2.166e-08 d yr n .184122644682183 7.4501e-10 deg/d Q 3.294306287915955 8.8864e-09 AU   Orbit Determination Parameters    # obs. used (total)      1865      data-arc span      41408 days (113.37 yr)      first obs. used      1899-12-07      last obs. used      2013-04-21      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .58318      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:35:30   Additional Information  Earth MOID = 1.84545 AU   T_jup = 3.176  [ 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 6.65 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17 magnitude slope G 0.19   n/a PDS3 (MPC 17258) Fit diameter diameter 224.96 km 4.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17 rotation period rot_per 9.727 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.] [Michalowski, T.; Kaasalainen, M.; Marciniak, A.; Denchev, P.; et al. (2005) Astron. Astrophys. 443, 329-335.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.0764   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17 B-V BV .666 mag .010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=10; phase (min.=1.70, mean=9.61, max.=18.97) deg. U-B UB .310 mag .044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=9; phase (min.=1.70, mean=9.60, max.=17.68) deg. Tholen spectral type spec_T CU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo 451 Patientia (1899 EY)          Discovered 1899-Dec-04 by Charlois, A. at Nice Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1899 EY = A902 MB  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-20 04:35 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin