+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   16551 (1991 RT14) Classification: Main-belt Asteroid          SPK-ID: 2016551 [ 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 .1022664404472759 6.9549e-08   a 2.770876933677953 3.6252e-08 AU q 2.487509212753246 1.8247e-07 AU i 15.28939071461287 9.3791e-06 deg node 169.7974697442848 2.4056e-05 deg peri 260.3100338116539 5.3097e-05 deg M 183.7479077435327 4.7612e-05 deg tp 2457225.314074876381 (2015-Jul-21.81407488) 0.00022648 JED period 1684.706621941401 4.61 3.3062e-05 9.052e-08 d yr n .2136870570290439 4.1935e-09 deg/d Q 3.054244654602659 3.9959e-08 AU   Orbit Determination Parameters    # obs. used (total)      930      data-arc span      8801 days (24.10 yr)      first obs. used      1989-03-06      last obs. used      2013-04-10      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .53932      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:03:29   Additional Information  Earth MOID = 1.55319 AU   T_jup = 3.278  [ 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 13.2 mag n/a PDS3 (MPO 2866)   16551 (1991 RT14)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar (675) Reference: 20000913/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 RT14 = 1989 ER7 = 1998 FS22  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 13:21 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin