+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   193873 (2001 QX157) Classification: Main-belt Asteroid          SPK-ID: 2193873 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1720097318593173 3.2749e-08   a 2.198260724691642 8.859e-09 au q 1.820138486880564 7.4386e-08 au i 1.84449474440525 5.2361e-06 deg node 189.1886812880943 0.00010737 deg peri 59.46956648513427 0.00010904 deg M 339.0085025376873 1.61e-05 deg tp 2459069.915770378994 (2020-Aug-08.41577038) 5.319e-05 TDB period 1190.466634469666 3.26 7.1964e-06 1.97e-08 d yr n .3024024273980382 1.828e-09 deg/d Q 2.576382962502719 1.0383e-08 au   Orbit Determination Parameters    # obs. used (total)      413      data-arc span      6867 days (18.80 yr)      first obs. used      2001-08-23      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56357      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 06:24:58   Additional Information  Earth MOID = .807147 au   Jupiter MOID = 2.45095 au   T_jup = 3.647  [ hide covariance matrix ] Orbital Elements at Epoch 2457170.5 (2015-May-28.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1722862714419135 3.2687e-08   q 1.819430076140299 7.4258e-08 au tp 2456688.597288906558 (2014-Jan-31.09728891) 5.659e-05 TDB node 189.2084978757818 0.00010742 deg peri 59.405921026479 0.00010908 deg i 1.843726422925162 5.2365e-06 deg   Orbit Determination Parameters    # obs. used (total)      413      data-arc span      6867 days (18.80 yr)      first obs. used      2001-08-23      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56357      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 06:24:58   Additional Information  Jupiter MOID = 2.45095 au   T_jup = 3.647  Orbit Covariance (6×6)   e q tp node peri i e 1.068452652379028E-15 -2.416321106247571E-15 -4.165199977328393E-13 1.044478281226549E-14 -1.580650262854286E-13 8.80884199341213E-17 q -2.416321106247571E-15 5.514320073392692E-15 7.638320135304479E-13 -2.315888987654422E-14 3.061792248816815E-13 -1.505862630048301E-17 tp -4.165199977328393E-13 7.638320135304479E-13 3.202439952187719E-9 -4.229822948313401E-11 1.079015380998505E-9 -1.167263799520869E-12 node 1.044478281226549E-14 -2.315888987654422E-14 -4.229822948313401E-11 1.153884861385117E-8 -1.154620140802405E-8 -9.290560242728351E-11 peri -1.580650262854286E-13 3.061792248816815E-13 1.079015380998505E-9 -1.154620140802405E-8 1.189896525119852E-8 9.249635874932235E-11 i 8.80884199341213E-17 -1.505862630048301E-17 -1.167263799520869E-12 -9.290560242728351E-11 9.249635874932235E-11 2.742139163887136E-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 16.9   n/a MPO459867   193873 (2001 QX157)          Discovered 2001-Aug-23 by LONEOS at Anderson Mesa Reference: 20081113/Numbers.arc Last Updated: 2008-11-17 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-19 06:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin