+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7875 (1991 ES1) Classification: Main-belt Asteroid          SPK-ID: 2007875 [ 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 .1791214645653182 5.2388e-08   a 2.644435618914313 2.5187e-08 AU q 2.170760437905687 1.4033e-07 AU i 14.14382668175246 8.4503e-06 deg node 165.4851669840143 2.271e-05 deg peri 264.4173823318649 3.3888e-05 deg M 128.0809451740673 2.8819e-05 deg tp 2455841.669698050337 (2011-Oct-07.16969805) 0.00012206 JED period 1570.716927709021 4.30 2.244e-05 6.144e-08 d yr n .2291947031634021 3.2744e-09 deg/d Q 3.118110799922938 2.9698e-08 AU   Orbit Determination Parameters    # obs. used (total)      1115      data-arc span      13355 days (36.56 yr)      first obs. used      1976-09-28      last obs. used      2013-04-22      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .51395      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:28:32   Additional Information  Earth MOID = 1.23671 AU   T_jup = 3.328  [ 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 12.3 mag n/a PDS3 (MPC 30637)   7875 (1991 ES1)          Discovered 1991-Mar-07 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1991 ES1 = 1976 SL8 = 1993 PM4  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 09:24 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin