+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   295558 (2008 SM55) Classification: Jupiter Trojan          SPK-ID: 2295558 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09063467218995715 7.3514e-08   a 5.15424706644434 1.6324e-07 au q 4.68709357319111 4.4109e-07 au i 15.3404444891605 1.1122e-05 deg node 199.6192348571323 2.4157e-05 deg peri 106.3669592281078 8.4088e-05 deg M 63.62397471627003 7.2125e-05 deg tp 2458245.121583397947 (2018-May-06.62158340) 0.00087041 TDB period 4274.115711717694 11.70 0.00020305 5.559e-07 d yr n .08422794895632858 4.0015e-09 deg/d Q 5.621400559697571 1.7804e-07 au   Orbit Determination Parameters    # obs. used (total)      184      data-arc span      8946 days (24.49 yr)      first obs. used      1995-07-28      last obs. used      2020-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53198      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 16:40:45   Additional Information  Earth MOID = 3.71391 au   Jupiter MOID = .0588159 au   T_jup = 2.921  [ hide covariance matrix ] Orbital Elements at Epoch 2457353.5 (2015-Nov-27.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08945251390791854 7.2625e-08   q 4.686709813093692 4.3486e-07 au tp 2458237.358231994801 (2018-Apr-28.85823199) 0.00088534 TDB node 199.6239711830868 2.4151e-05 deg peri 105.5379741299219 8.5422e-05 deg i 15.34714679954737 1.1127e-05 deg   Orbit Determination Parameters    # obs. used (total)      184      data-arc span      8946 days (24.49 yr)      first obs. used      1995-07-28      last obs. used      2020-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53198      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 16:40:45   Additional Information  Jupiter MOID = .0588159 au   T_jup = 2.921  Orbit Covariance (6×6)   e q tp node peri i e 5.274380964217625E-15 -2.979574701986209E-14 3.61055245678399E-11 -2.556742363574009E-15 3.434251669844753E-12 -2.823826216716042E-15 q -2.979574701986209E-14 1.891036979075197E-13 -2.392894710839315E-10 3.445945964834427E-14 -2.309553607765093E-11 2.146778088695167E-14 tp 3.61055245678399E-11 -2.392894710839315E-10 7.838230620084003E-7 -1.043574725972105E-10 7.252135499784244E-8 -2.987143965839514E-11 node -2.556742363574009E-15 3.445945964834427E-14 -1.043574725972105E-10 5.832565732439658E-10 -5.720465856932549E-10 -3.220768746241213E-11 peri 3.434251669844753E-12 -2.309553607765093E-11 7.252135499784244E-8 -5.720465856932549E-10 7.296924292331497E-9 2.810082704861414E-11 i -2.823826216716042E-15 2.146778088695167E-14 -2.987143965839514E-11 -3.220768746241213E-11 2.810082704861414E-11 1.238164976813486E-10 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.7   n/a MPO413252   295558 (2008 SM55)          Discovered 2008-Sep-20 by Mt. Lemmon Survey at Mount Lemmon Reference: 20110912/Numbers.arc Last Updated: 2011-09-14 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-13 03:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin