+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   43802 (1991 PY18) Classification: Main-belt Asteroid          SPK-ID: 2043802 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO229320 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2079735 n/a   a 2.3885368 n/a AU q 1.8917844 n/a AU i 3.57467 n/a deg node 323.14238 n/a deg peri 26.70918 n/a deg M 299.68946 n/a deg tp 2456626.3848118 (2013-Nov-29.88481180) n/a JED period 1348.3303625 3.69 n/a n/a d yr n 0.26699688 n/a deg/d Q 2.8852892 n/a AU   Orbit Determination Parameters    # obs. used (total)      491      first obs. used      1991-??-??      last obs. used      2012-04-15      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.54      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.501  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.1 mag n/a MPO229320   43802 (1991 PY18)          Discovered 1991-Aug-10 by Holt, H. E. at Palomar (675) Reference: 20020822/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 PY18 = 1995 UA4 = 1997 BL9  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 14:36 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin