+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   18342 (1989 ST9) Classification: Main-belt Asteroid          SPK-ID: 2018342 [ 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 .2368162354699748 8.5221e-08   a 2.349258725318495 1.9237e-08 AU q 1.792916117843577 2.0037e-07 AU i 2.274765760479613 9.3251e-06 deg node 19.32479475756858 0.00016894 deg peri 315.519968785644 0.00016983 deg M 207.72385551813 1.9002e-05 deg tp 2456956.819228637736 (2014-Oct-26.31922864) 7.399e-05 JED period 1315.208780672994 3.60 1.6155e-05 4.423e-08 d yr n .2737208002943742 3.3621e-09 deg/d Q 2.905601332793412 2.3793e-08 AU   Orbit Determination Parameters    # obs. used (total)      404      data-arc span      8609 days (23.57 yr)      first obs. used      1989-09-04      last obs. used      2013-03-31      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .60391      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:18:37   Additional Information  Earth MOID = .783716 AU   T_jup = 3.519  [ 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 15.9 mag n/a PDS3 (MPO 5165)   18342 (1989 ST9)          Discovered 1989-Sep-26 by Debehogne, H. at La Silla (809) Reference: 20001111/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 ST9 = 1999 FM14  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 08:39 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin