+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   55740 (1989 YL2) Classification: Outer Main-belt Asteroid          SPK-ID: 2055740 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO236652 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1636878 n/a   a 3.4383172 n/a AU q 2.8755066 n/a AU i 6.14508 n/a deg node 127.84379 n/a deg peri 315.76821 n/a deg M 260.33926 n/a deg tp 2457045.1722048 (2015-Jan-22.67220480) n/a JED period 2328.7203539 6.38 n/a n/a d yr n 0.15459134 n/a deg/d Q 4.0011278 n/a AU   Orbit Determination Parameters    # obs. used (total)      488      first obs. used      1989-??-??      last obs. used      2012-08-11      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.108  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.6 mag n/a MPO236652   55740 (1989 YL2)          Discovered 1989-Dec-30 by McNaught, R. H. at Siding Spring (413) Reference: 20030318/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 YL2 = 1990 BY2 = 2001 UQ135  [ 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