+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   2000 Herschel (1960 OA) Classification: Main-belt Asteroid          SPK-ID: 2002000 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2976146235299868 5.4142e-08   a 2.379928653482778 9.7142e-09 AU q 1.671627083248272 1.2792e-07 AU i 22.79755300614093 9.971e-06 deg node 292.0672691332166 1.9837e-05 deg peri 130.1613085335758 2.7052e-05 deg M 63.64563980011584 1.6389e-05 deg tp 2456163.411499785441 (2012-Aug-23.91149979) 6.0818e-05 JED period 1341.048033224203 3.67 8.2107e-06 2.248e-08 d yr n .2684467603553864 1.6436e-09 deg/d Q 3.088230223717283 1.2605e-08 AU   Orbit Determination Parameters    # obs. used (total)      751      data-arc span      28769 days (78.77 yr)      first obs. used      1934-07-12      last obs. used      2013-04-17      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .4681      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:48:56   Additional Information  Earth MOID = .753199 AU   T_jup = 3.377  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.25 mag n/a PDS3 (MPC 17264)   rotation period rot_per 130. 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: [Warner, B.D. (2011) Minor Planet Bul. 38, 96-101.] B-V BV .893 mag .028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=21.55, mean=24.12, max.=26.77) deg. U-B UB .494 mag .071 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=21.55, mean=23.24, max.=26.57) deg. Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices 2000 Herschel (1960 OA)          Discovered 1960-Jul-29 by Schubart, J. at Sonneberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1960 OA = 1934 NX  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 05:16 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin