+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   146602 (2001 TW188) Classification: Main-belt Asteroid          SPK-ID: 2146602 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1200013774390289 3.6102e-08   a 2.737943685958167 1.221e-08 au q 2.409386672292695 1.0075e-07 au i 5.859308367364475 4.888e-06 deg node 20.25798695485679 3.3068e-05 deg peri 47.3969607300744 3.837e-05 deg M 18.32821244775803 1.8457e-05 deg tp 2458916.253318417335 (2020-Mar-07.75331842) 8.4768e-05 TDB period 1654.760684175149 4.53 1.1069e-05 3.031e-08 d yr n .2175541173069686 1.4553e-09 deg/d Q 3.066500699623639 1.3675e-08 au   Orbit Determination Parameters    # obs. used (total)      869      data-arc span      6973 days (19.09 yr)      first obs. used      2001-10-12      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50458      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 23:07:00   Additional Information  Earth MOID = 1.42756 au   Jupiter MOID = 2.23211 au   T_jup = 3.333  [ hide covariance matrix ] Orbital Elements at Epoch 2457028.5 (2015-Jan-06.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1175062411810216 3.5881e-08   q 2.416680247403472 9.9854e-08 au tp 2457258.070716542210 (2015-Aug-23.57071654) 8.698e-05 TDB node 20.29963193606943 3.3034e-05 deg peri 46.77216332920298 3.8638e-05 deg i 5.863419210896249 4.8881e-06 deg   Orbit Determination Parameters    # obs. used (total)      869      data-arc span      6973 days (19.09 yr)      first obs. used      2001-10-12      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50458      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 23:07:00   Additional Information  Jupiter MOID = 2.23211 au   T_jup = 3.333  Orbit Covariance (6×6)   e q tp node peri i e 1.287477332909434E-15 -3.562173425023988E-15 -8.058858940094926E-13 4.081018368373466E-15 -1.559131041639412E-13 -8.028217661500108E-16 q -3.562173425023988E-15 9.970915852195589E-15 2.193007769832265E-12 -1.180411720767256E-14 4.184915758661747E-13 2.304529444295315E-15 tp -8.058858940094926E-13 2.193007769832265E-12 7.565475454896068E-9 1.788089565495482E-12 1.749676513408373E-9 1.921090449155333E-12 node 4.081018368373466E-15 -1.180411720767256E-14 1.788089565495482E-12 1.091248298949466E-9 -1.084746574287504E-9 -7.806047818275321E-12 peri -1.559131041639412E-13 4.184915758661747E-13 1.749676513408373E-9 -1.084746574287504E-9 1.492871551850994E-9 8.186904858616092E-12 i -8.028217661500108E-16 2.304529444295315E-15 1.921090449155333E-12 -7.806047818275321E-12 8.186904858616092E-12 2.389380252579955E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.2   n/a MPO453931   diameter diameter 4.016 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.100   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   146602 (2001 TW188)          Discovered 2001-Oct-14 by LINEAR at Socorro Reference: 20070106/Numbers.arc Last Updated: 2007-01-09 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-27 23:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin