+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   91809 (1999 TG248) Classification: Main-belt Asteroid          SPK-ID: 2091809 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08120165220961353 3.7874e-08   a 3.069721265191307 2.0612e-08 au q 2.820454826634788 1.245e-07 au i 9.600526705516039 5.3086e-06 deg node 186.2108502295754 1.9395e-05 deg peri 235.1841992742858 3.909e-05 deg M 285.5958043339264 3.2231e-05 deg tp 2459406.514708090918 (2021-Jul-11.01470809) 0.00017571 TDB period 1964.476513780503 5.38 1.9786e-05 5.417e-08 d yr n .18325492693583 1.8458e-09 deg/d Q 3.318987703747826 2.2286e-08 au   Orbit Determination Parameters    # obs. used (total)      1074      data-arc span      7707 days (21.10 yr)      first obs. used      1999-10-08      last obs. used      2020-11-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50898      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:21:05   Additional Information  Earth MOID = 1.84524 au   Jupiter MOID = 2.00963 au   T_jup = 3.205  [ hide covariance matrix ] Orbital Elements at Epoch 2457528.5 (2016-May-20.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0815353741788951 3.8893e-08   q 2.819622611829798 1.276e-07 au tp 2457419.538603459987 (2016-Feb-01.03860346) 0.00017389 TDB node 186.5060610104661 1.9307e-05 deg peri 231.3550224585975 3.8676e-05 deg i 9.621851924943361 5.3209e-06 deg   Orbit Determination Parameters    # obs. used (total)      1074      data-arc span      7707 days (21.10 yr)      first obs. used      1999-10-08      last obs. used      2020-11-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50898      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:21:05   Additional Information  Jupiter MOID = 2.00963 au   T_jup = 3.205  Orbit Covariance (6×6)   e q tp node peri i e 1.512680323626709E-15 -4.917084035978309E-15 -2.357491719238772E-12 1.729042291229008E-15 -4.227313136730437E-13 -1.756250184068973E-15 q -4.917084035978309E-15 1.628213437196994E-14 6.983095944706836E-12 -6.366812775134017E-15 1.24609780622291E-12 6.878713607182953E-15 tp -2.357491719238772E-12 6.983095944706836E-12 3.023722309275374E-8 -1.044724397745517E-11 5.834460483897258E-9 6.037233686704189E-12 node 1.729042291229008E-15 -6.366812775134017E-15 -1.044724397745517E-11 3.727535240303798E-10 -3.689517577855777E-10 -1.732187842043345E-12 peri -4.227313136730437E-13 1.24609780622291E-12 5.834460483897258E-9 -3.689517577855777E-10 1.495828530835676E-9 2.745175196125843E-12 i -1.756250184068973E-15 6.878713607182953E-15 6.037233686704189E-12 -1.732187842043345E-12 2.745175196125843E-12 2.831195384310544E-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 14.5   n/a MPO432455   91809 (1999 TG248)          Discovered 1999-Oct-08 by CSS at Catalina Reference: 20041028/Numbers.arc Last Updated: 2004-10-29 [ show close-approach data ] Alternate Designations  1999 TG248 = 2001 FT162  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 02:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin