+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   9183 (1991 OW) Classification: Main-belt Asteroid          SPK-ID: 2009183 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO247449 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1989049 n/a   a 2.2933168 n/a AU q 1.8371649 n/a AU i 5.88226 n/a deg node 282.23402 n/a deg peri 336.43213 n/a deg M 132.16250 n/a deg tp 2455934.8064087 (2012-Jan-08.30640870) n/a JED period 1268.5118158 3.47 n/a n/a d yr n 0.28379712 n/a deg/d Q 2.7494687 n/a AU   Orbit Determination Parameters    # obs. used (total)      774      first obs. used      1950-??-??      last obs. used      2012-12-24      # oppositions      15      planetary ephem.      DE403      condition code      0      fit RMS      0.54      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.563  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.8 mag n/a PDS3 (MPC 32420)   9183 (1991 OW)          Discovered 1991-Jul-18 by Holt, H. E. at Palomar (675) Reference: 19980910/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 OW = 3121 P-L  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 07:42 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin