+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249652 (1999 TY268) Classification: Main-belt Asteroid          SPK-ID: 2249652 [ 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 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08593238123215578 8.9628e-08   a 3.129175884008143 4.6404e-08 au q 2.860278349001087 3.0029e-07 au i 9.233768990082069 6.4615e-06 deg node 275.5646336852855 5.5225e-05 deg peri 66.75787365440171 6.6703e-05 deg M 289.4836820683444 4.1285e-05 deg tp 2459396.532215298230 (2021-Jul-01.03221530) 0.00023666 TDB period 2021.824191750101 5.54 4.4974e-05 1.231e-07 d yr n .1780570246755146 3.9607e-09 deg/d Q 3.398073419015198 5.0392e-08 au   Orbit Determination Parameters    # obs. used (total)      223      data-arc span      7158 days (19.60 yr)      first obs. used      1999-10-03      last obs. used      2019-05-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5259      source      ORB      producer      Otto Matic      solution date      2019-May-30 08:41:04   Additional Information  Earth MOID = 1.86736 au   Jupiter MOID = 1.94545 au   T_jup = 3.188  [ show covariance matrix ] [ 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 15.5   n/a MPO254460   diameter diameter 4.620 km 0.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.052   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   249652 (1999 TY268)          Discovered 1999-Oct-03 by LINEAR at Socorro Reference: 20100923/Numbers.arc Last Updated: 2010-09-27 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1906-Sep-23 19:16 00:07 Jupiter 1.9688402028677 1.96883948626339 1.96884091949014 4.32654472451347 4.22593910960351 2417477.303070719 6.95445015451129 444.44966105063 23.4443204680939 -87.2135728097111 2724140.86186491 T 10 CATAB v2.0e-lin.ifort 2019-May-30 08:41:06 2019-May-30 08:41 1989-Nov-19 22:02 00:02 Jupiter 1.96475137707473 1.96475081317298 1.96475194097682 4.3267794884143 4.22596760727582 2447850.417999142 1.57514233339266 134.890462639193 23.8369116047473 -86.3926418181241 2627277.34832682 T 10 CATAB v2.0e-lin.ifort 2019-May-30 08:41:06 2019-May-30 08:41 2073-Jan-16 19:05 00:04 Jupiter 1.97326832278048 1.97326773181412 1.97326891374807 4.33046703975694 4.23018294327926 2478224.295275505 3.844227136292 234.227018607736 25.7178642730858 87.4066435524804 2796856.27105369 T 10 CATAB v2.0e-lin.ifort 2019-May-30 08:41:06 2019-May-30 08:41 2156-Mar-16 16:37 00:09 Jupiter 1.98273372796374 1.98273291534573 1.98273454060576 4.31700654687243 4.21688829234575 2508598.192405863 9.19927017041298 492.570922393243 26.9337650045518 86.0345971365118 2682908.20212981 T 10 CATAB v2.0e-lin.ifort 2019-May-30 08:41:06 2019-May-30 08:41 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 11:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin