+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109446 (2001 QS204) Classification: Outer Main-belt Asteroid          SPK-ID: 2109446 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06566381913943166 5.6441e-08   a 3.230712363369823 3.4305e-08 au q 3.018571451049981 1.8998e-07 au i 9.427129540912823 5.5921e-06 deg node 300.9667994704927 3.5978e-05 deg peri 53.38276001506286 5.5516e-05 deg M 66.26632235048058 4.041e-05 deg tp 2458610.076243845862 (2019-May-06.57624385) 0.00023901 TDB period 2121.025390123679 5.81 3.3783e-05 9.249e-08 d yr n .169729227040987 2.7034e-09 deg/d Q 3.442853275689664 3.6558e-08 au   Orbit Determination Parameters    # obs. used (total)      438      data-arc span      8292 days (22.70 yr)      first obs. used      1998-01-29      last obs. used      2020-10-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5207      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:12:02   Additional Information  Earth MOID = 2.02361 au   Jupiter MOID = 1.91813 au   T_jup = 3.162  [ hide covariance matrix ] Orbital Elements at Epoch 2457365.5 (2015-Dec-09.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06473400445912805 5.6668e-08   q 3.025029566682094 1.8959e-07 au tp 2456464.901089338993 (2013-Jun-21.40108934) 0.00025005 TDB node 301.3404381923604 3.5805e-05 deg peri 49.48185205706605 5.5956e-05 deg i 9.449229802042826 5.6057e-06 deg   Orbit Determination Parameters    # obs. used (total)      438      data-arc span      8292 days (22.70 yr)      first obs. used      1998-01-29      last obs. used      2020-10-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5207      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:12:02   Additional Information  Jupiter MOID = 1.91813 au   T_jup = 3.162  Orbit Covariance (6×6)   e q tp node peri i e 3.211206208595722E-15 -1.059305552568594E-14 -2.793379203602271E-14 -9.847218337116183E-15 -5.140889575406158E-14 -5.418560816311058E-15 q -1.059305552568594E-14 3.594592680372534E-14 -1.832010848367209E-12 4.121023731728115E-14 -8.951824615200479E-14 2.089728393771932E-14 tp -2.793379203602271E-14 -1.832010848367209E-12 6.252352722734306E-8 -1.596324794649499E-11 1.079503220473306E-8 -1.481532357747209E-11 node -9.847218337116183E-15 4.121023731728115E-14 -1.596324794649499E-11 1.282007278389661E-9 -1.26540360054676E-9 4.259669372591701E-11 peri -5.140889575406158E-14 -8.951824615200479E-14 1.079503220473306E-8 -1.26540360054676E-9 3.13106370677176E-9 -4.441604483522546E-11 i -5.418560816311058E-15 2.089728393771932E-14 -1.481532357747209E-11 4.259669372591701E-11 -4.441604483522546E-11 3.142422113350585E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.8   n/a MPO453554   109446 (2001 QS204)          Discovered 2001-Aug-23 by LONEOS at Anderson Mesa Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  2001 QS204 = 1998 BV37  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-24 20:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin