+ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1720097321856535 3.2889e-08   a 2.198260724870323 9.0126e-09 au q 1.820138486311138 7.4576e-08 au i 1.84449327685548 5.47e-06 deg node 189.1887199785197 0.00011388 deg peri 59.46952807138617 0.00011544 deg M 339.0085021460466 1.6469e-05 deg tp 2459069.915771682556 (2020-Aug-08.41577168) 5.4428e-05 TDB period 1190.466634614813 3.26 7.3211e-06 2.004e-08 d yr n .3024024273611678 1.8597e-09 deg/d Q 2.576382963429508 1.0563e-08 au   Orbit Determination Parameters    # obs. used (total)      381      data-arc span      6822 days (18.68 yr)      first obs. used      2001-08-23      last obs. used      2020-04-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56695      source      ORB      producer      Otto Matic      solution date      2020-May-21 05:58:17   Additional Information  Earth MOID = .807147 au   Jupiter MOID = 2.45095 au   T_jup = 3.647  [ hide covariance matrix ] Orbital Elements at Epoch 2457015.5 (2014-Dec-24.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1721972193828685 3.2819e-08   q 1.819851325263742 7.4446e-08 au tp 2456688.631626862532 (2014-Jan-31.13162686) 5.7325e-05 TDB node 189.2066850176335 0.00011394 deg peri 59.4408581756277 0.0001155 deg i 1.843549410915544 5.4704e-06 deg   Orbit Determination Parameters    # obs. used (total)      381      data-arc span      6822 days (18.68 yr)      first obs. used      2001-08-23      last obs. used      2020-04-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56695      source      ORB      producer      Otto Matic      solution date      2020-May-21 05:58:17   Additional Information  Jupiter MOID = 2.45095 au   T_jup = 3.647  Orbit Covariance (6×6)   e q tp node peri i e 1.077082372890815E-15 -2.43169843406968E-15 -3.900974576777221E-13 3.72331893072775E-15 -1.442337232985099E-13 3.482124683897021E-16 q -2.43169843406968E-15 5.542194265944384E-15 7.179697917528077E-13 -7.982295451216149E-15 2.786672899674771E-13 -6.207975289064692E-16 tp -3.900974576777221E-13 7.179697917528077E-13 3.286191831581558E-9 -3.065043296859183E-11 1.08991913605534E-9 -1.737917253689959E-12 node 3.72331893072775E-15 -7.982295451216149E-15 -3.065043296859183E-11 1.298267767255068E-8 -1.298548635454487E-8 -1.523798815594223E-10 peri -1.442337232985099E-13 2.786672899674771E-13 1.08991913605534E-9 -1.298548635454487E-8 1.333977046680031E-8 1.517580684059124E-10 i 3.482124683897021E-16 -6.207975289064692E-16 -1.737917253689959E-12 -1.523798815594223E-10 1.517580684059124E-10 2.992532140717087E-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 ] 2020-Sep-25 08:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin