+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   9188 (1991 RM15) Classification: Main-belt Asteroid          SPK-ID: 2009188 [ 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 .2224086798696635 6.4976e-08   a 2.387686529005274 2.3745e-08 AU q 1.856644320146632 1.5703e-07 AU i 2.092856245430628 6.8233e-06 deg node 309.1415134863258 0.00018874 deg peri 4.05588273401511 0.00018922 deg M 334.6148331421576 2.8633e-05 deg tp 2456495.525882659071 (2013-Jul-22.02588266) 0.00010827 JED period 1347.610513999718 3.69 2.0102e-05 5.504e-08 d yr n .2671395008128257 3.9849e-09 deg/d Q 2.918728737863916 2.9026e-08 AU   Orbit Determination Parameters    # obs. used (total)      823      data-arc span      11858 days (32.47 yr)      first obs. used      1980-10-10      last obs. used      2013-03-29      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .5481      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:34:35   Additional Information  Earth MOID = .842502 AU   T_jup = 3.499  [ 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 14.5 mag n/a PDS3 (MPC 32421)   9188 (1991 RM15)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar (675) Reference: 19980910/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 RM15 = 1980 TP7  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-18 22:39 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin