+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   312611 (2009 RY68) Classification: Jupiter Trojan          SPK-ID: 2312611 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07906838303742426 1.265e-07   a 5.167553767203957 2.8188e-07 au q 4.75896364657219 7.8839e-07 au i 3.791147039987762 1.0359e-05 deg node 147.0182922505102 0.00018834 deg peri 229.3747662049314 0.00020958 deg M 338.1739533655821 0.00011176 deg tp 2459260.634833770862 (2021-Feb-15.13483377) 0.0013468 TDB period 4290.678093294008 11.75 0.00035108 9.612e-07 d yr n .0839028219251991 6.8652e-09 deg/d Q 5.576143887835725 3.0417e-07 au   Orbit Determination Parameters    # obs. used (total)      94      data-arc span      7591 days (20.78 yr)      first obs. used      1996-09-07      last obs. used      2017-06-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58831      source      ORB      producer      Otto Matic      solution date      2019-Jul-14 12:40:30   Additional Information  Earth MOID = 3.76181 au   Jupiter MOID = .0704766 au   T_jup = 2.989  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.8   n/a MPO494657   312611 (2009 RY68)          Discovered 2009-Sep-15 by Spacewatch at Kitt Peak Reference: 20120109/Numbers.arc Last Updated: 2012-01-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-16 18:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin