+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   12268 (1990 OY1) Classification: Main-belt Asteroid          SPK-ID: 2012268 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256955 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1740149 n/a   a 2.5986708 n/a AU q 2.1464634 n/a AU i 5.81084 n/a deg node 72.85187 n/a deg peri 210.28780 n/a deg M 180.50620 n/a deg tp 2457163.4081721 (2015-May-20.90817210) n/a JED period 1530.1193799 4.19 n/a n/a d yr n 0.23527576 n/a deg/d Q 3.0508782 n/a AU   Orbit Determination Parameters    # obs. used (total)      915      first obs. used      1989-??-??      last obs. used      2013-03-07      # oppositions      15      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.387  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.3 mag n/a PDS3 (MPC 36678)   12268 (1990 OY1)          Discovered 1990-Jul-29 by Holt, H. E. at Palomar (675) Reference: 19991123/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 OY1 = 1989 EN8  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 17:23 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin