+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   43808 (1991 RF11) Classification: Main-belt Asteroid          SPK-ID: 2043808 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250623 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2164547 n/a   a 2.4417128 n/a AU q 1.9131926 n/a AU i 4.60507 n/a deg node 323.53608 n/a deg peri 74.99064 n/a deg M 215.55505 n/a deg tp 2456959.6652557 (2014-Oct-29.16525570) n/a JED period 1393.6069905 3.82 n/a n/a d yr n 0.25832247 n/a deg/d Q 2.9702330 n/a AU   Orbit Determination Parameters    # obs. used (total)      678      first obs. used      1987-??-??      last obs. used      2012-05-15      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.54      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.464  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.6 mag n/a MPO250623   43808 (1991 RF11)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar (675) Reference: 20020822/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 RF11 = 1995 WL2  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 09:01 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin