+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   312997 (1999 TG245) Classification: Main-belt Asteroid          SPK-ID: 2312997 [ 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 .2183564468458503 6.2322e-08   a 2.438136221951838 1.4504e-08 au q 1.905753459600269 1.5295e-07 au i 2.433943739563803 6.9458e-06 deg node 4.411222073776171 0.00015626 deg peri 354.1632884496779 0.00015689 deg M 160.9751809267497 1.463e-05 deg tp 2458378.712770844248 (2018-Sep-17.21277084) 5.4733e-05 TDB period 1390.546053170325 3.81 1.2408e-05 3.397e-08 d yr n .2588911019374231 2.3102e-09 deg/d Q 2.970518984303407 1.7671e-08 au   Orbit Determination Parameters    # obs. used (total)      212      data-arc span      7420 days (20.31 yr)      first obs. used      1999-10-07      last obs. used      2020-01-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54881      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 18:49:24   Additional Information  Earth MOID = .902105 au   Jupiter MOID = 2.47938 au   T_jup = 3.469  [ hide covariance matrix ] Orbital Elements at Epoch 2457324.5 (2015-Oct-29.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2184952500267337 6.3094e-08   q 1.905341334178962 1.5505e-07 au tp 2456984.783022727338 (2014-Nov-23.28302273) 5.2128e-05 TDB node 4.462654672952703 0.00015592 deg peri 353.5686027237309 0.00015655 deg i 2.439293145406899 6.9597e-06 deg   Orbit Determination Parameters    # obs. used (total)      212      data-arc span      7420 days (20.31 yr)      first obs. used      1999-10-07      last obs. used      2020-01-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54881      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 18:49:24   Additional Information  Jupiter MOID = 2.47938 au   T_jup = 3.469  Orbit Covariance (6×6)   e q tp node peri i e 3.98090879895027E-15 -9.757149750568524E-15 -2.154655444930809E-12 -3.997126966437421E-14 -5.813423141686961E-13 -3.103831473514912E-15 q -9.757149750568524E-15 2.404181535386784E-14 5.304897659916641E-12 8.913703435908286E-14 1.445871740614393E-12 8.04200265359932E-15 tp -2.154655444930809E-12 5.304897659916641E-12 2.717325416286478E-9 3.09458198091909E-11 7.906822628673428E-10 2.368806838176942E-12 node -3.997126966437421E-14 8.913703435908286E-14 3.09458198091909E-11 2.430990841102262E-8 -2.427826975889271E-8 -7.24338022435501E-10 peri -5.813423141686961E-13 1.445871740614393E-12 7.906822628673428E-10 -2.427826975889271E-8 2.450881578878912E-8 7.243902598418153E-10 i -3.103831473514912E-15 8.04200265359932E-15 2.368806838176942E-12 -7.24338022435501E-10 7.243902598418153E-10 4.84376780415663E-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 17.3   n/a MPO460291   312997 (1999 TG245)          Discovered 1999-Oct-07 by CSS at Catalina Reference: 20120207/Numbers.arc Last Updated: 2012-02-09 [ show close-approach data ] Alternate Designations  1999 TG245 = 2003 VY9  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 18:09 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin