+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   27755 (1991 PD11) Classification: Main-belt Asteroid          SPK-ID: 2027755 [ 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 .199145827011479 5.7749e-08   a 2.207446061663255 1.8763e-08 AU q 1.767842390130094 1.3365e-07 AU i 6.349878237042056 7.0197e-06 deg node 141.463959979469 5.7133e-05 deg peri 135.587256330601 6.1027e-05 deg M 254.9134276136296 2.6602e-05 deg tp 2456750.186047069566 (2014-Apr-02.68604707) 9.1573e-05 JED period 1197.935893105323 3.28 1.5274e-05 4.182e-08 d yr n .3005169158650033 3.8316e-09 deg/d Q 2.647049733196416 2.25e-08 AU   Orbit Determination Parameters    # obs. used (total)      843      data-arc span      7916 days (21.67 yr)      first obs. used      1991-08-05      last obs. used      2013-04-07      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .58171      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:47:17   Additional Information  Earth MOID = .758279 AU   T_jup = 3.626  [ 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 14.3 mag n/a PDS3 (MPO 15154)   27755 (1991 PD11)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar (675) Reference: 20010902/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 PD11 = 1998 TM6  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 09:52 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin