+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   300497 (2007 TW157) Classification: Main-belt Asteroid          SPK-ID: 2300497 [ 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 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .160036915984506 4.8586e-08   a 2.5792547542604 2.1177e-08 au q 2.166478777850191 1.2518e-07 au i 3.611012440378901 1.1983e-05 deg node 350.1495887531224 7.372e-05 deg peri 91.14867771567579 8.6882e-05 deg M 331.779658674886 4.4969e-05 deg tp 2459119.104057841670 (2020-Sep-26.60405784) 0.0001897 TDB period 1513.002990683304 4.14 1.8634e-05 5.102e-08 d yr n .2379374014570959 2.9304e-09 deg/d Q 2.992030730670609 2.4567e-08 au   Orbit Determination Parameters    # obs. used (total)      290      data-arc span      6228 days (17.05 yr)      first obs. used      2003-10-24      last obs. used      2020-11-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53771      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 06:07:07   Additional Information  Earth MOID = 1.18589 au   Jupiter MOID = 2.24493 au   T_jup = 3.405  [ hide covariance matrix ] Orbital Elements at Epoch 2457531.5 (2016-May-23.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .158146130899121 4.7513e-08   q 2.172158467056712 1.2203e-07 au tp 2457602.412235541080 (2016-Aug-01.91223554) 0.00018564 TDB node 350.344690377844 7.3589e-05 deg peri 90.37623840636799 8.7351e-05 deg i 3.616403625879236 1.1989e-05 deg   Orbit Determination Parameters    # obs. used (total)      290      data-arc span      6228 days (17.05 yr)      first obs. used      2003-10-24      last obs. used      2020-11-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53771      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 06:07:07   Additional Information  Jupiter MOID = 2.24493 au   T_jup = 3.405  Orbit Covariance (6×6)   e q tp node peri i e 2.257479036629708E-15 -5.734036838554399E-15 4.988393913027904E-12 -1.539495485210006E-14 1.341455726221793E-12 -3.133762772363902E-16 q -5.734036838554399E-15 1.489171949118244E-14 -1.139502572677474E-11 3.479188087078557E-14 -3.102104867592805E-12 1.256770541450936E-15 tp 4.988393913027904E-12 -1.139502572677474E-11 3.446142738794771E-8 -1.057247081737105E-10 8.746147713291251E-9 -2.131943719912265E-12 node -1.539495485210006E-14 3.479188087078557E-14 -1.057247081737105E-10 5.415359521587599E-9 -5.43008544234622E-9 -4.209225587693835E-10 peri 1.341455726221793E-12 -3.102104867592805E-12 8.746147713291251E-9 -5.43008544234622E-9 7.630237853305758E-9 4.194361223631079E-10 i -3.133762772363902E-16 1.256770541450936E-15 -2.131943719912265E-12 -4.209225587693835E-10 4.194361223631079E-10 1.43739555608821E-10 [ 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 MPO494601   300497 (2007 TW157)          Discovered 2007-Oct-09 by LINEAR at Socorro Reference: 20111012/Numbers.arc Last Updated: 2011-10-13 [ show close-approach data ] Alternate Designations  2007 TW157 = 2003 UM312 = 2005 EX326  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 07:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin