+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   8671 (1991 PW) Classification: Main-belt Asteroid          SPK-ID: 2008671 [ 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 .2154387789242169 6.211e-08   a 2.44737483137905 1.8738e-08 AU q 1.920115386136886 1.5791e-07 AU i 3.46301217482436 8.003e-06 deg node 268.4661027676508 0.00011246 deg peri 53.59736753291227 0.00011419 deg M 236.3028884453974 2.3656e-05 deg tp 2456881.014191749891 (2014-Aug-11.51419175) 9.4948e-05 JED period 1398.457141447489 3.83 1.606e-05 4.397e-08 d yr n .2574265519695355 2.9564e-09 deg/d Q 2.974634276621213 2.2774e-08 AU   Orbit Determination Parameters    # obs. used (total)      708      data-arc span      13325 days (36.48 yr)      first obs. used      1976-10-24      last obs. used      2013-04-18      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .60195      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:32:15   Additional Information  Earth MOID = .909774 AU   T_jup = 3.463  [ 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 31680)   8671 (1991 PW)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar (675) Reference: 19980511/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 PW = 1976 UE19 = 1996 XC27  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 10:03 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin