+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7984 (1980 SM) Classification: Main-belt Asteroid          SPK-ID: 2007984 [ 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 .1999336407948285 9.7257e-08   a 2.632875017578915 1.9835e-08 AU q 2.106474729556614 2.5306e-07 AU i 9.06735629513722 9.2584e-06 deg node 340.4098315764827 4.0033e-05 deg peri 27.72393594640671 4.3212e-05 deg M 220.1432200105344 1.8189e-05 deg tp 2457006.712401420454 (2014-Dec-15.21240142) 8.2109e-05 JED period 1560.42820754061 4.27 1.7634e-05 4.828e-08 d yr n .2307059038412256 2.6071e-09 deg/d Q 3.159275305601215 2.3801e-08 AU   Orbit Determination Parameters    # obs. used (total)      845      data-arc span      11910 days (32.61 yr)      first obs. used      1980-09-08      last obs. used      2013-04-18      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .5692      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:29:01   Additional Information  Earth MOID = 1.10871 AU   T_jup = 3.353  [ 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 13.7 mag n/a PDS3 (MPC 30848)   7984 (1980 SM)          Discovered 1980-Sep-29 by Vavrova, Z. at Klet Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1980 SM = 1995 DJ12  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 20:20 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin