+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102480 (1999 TW250) Classification: Main-belt Asteroid          SPK-ID: 2102480 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08962444999188811 3.458e-08   a 2.999519920648841 1.8322e-08 au q 2.730689597520977 9.942e-08 au i .492776686880036 3.8658e-06 deg node 48.88372766601375 0.0004089 deg peri 291.8485458642268 0.00040946 deg M 68.35842493628837 2.114e-05 deg tp 2458840.198890557053 (2019-Dec-22.69889056) 0.00011121 TDB period 1897.474956749695 5.20 1.7386e-05 4.76e-08 d yr n .18972582416406 1.7384e-09 deg/d Q 3.268350243776706 1.9964e-08 au   Orbit Determination Parameters    # obs. used (total)      741      data-arc span      10519 days (28.80 yr)      first obs. used      1992-04-24      last obs. used      2021-02-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5002      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:42:11   Additional Information  Earth MOID = 1.72026 au   Jupiter MOID = 2.06795 au   T_jup = 3.247  [ hide covariance matrix ] Orbital Elements at Epoch 2457558.5 (2016-Jun-19.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09331871070191912 3.4811e-08   q 2.71798682970456 1.0061e-07 au tp 2456939.286321586637 (2014-Oct-08.78632159) 0.00010598 TDB node 48.8131677987254 0.00040519 deg peri 291.3754358618595 0.00040571 deg i .4974143918163658 3.8678e-06 deg   Orbit Determination Parameters    # obs. used (total)      741      data-arc span      10519 days (28.80 yr)      first obs. used      1992-04-24      last obs. used      2021-02-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5002      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:42:11   Additional Information  Jupiter MOID = 2.06795 au   T_jup = 3.247  Orbit Covariance (6×6)   e q tp node peri i e 1.211793737938075E-15 -3.459478365597972E-15 1.613528400896482E-13 7.119361345230315E-15 7.389931532022973E-15 -5.40012410582749E-17 q -3.459478365597972E-15 1.012145149341762E-14 -6.494192026936049E-13 -2.736474834259495E-14 -3.58774071222835E-14 1.541101924333127E-16 tp 1.613528400896482E-13 -6.494192026936049E-13 1.123146813573742E-8 -4.442246313735344E-12 2.189429034243054E-9 -6.331088939726414E-14 node 7.119361345230315E-15 -2.736474834259495E-14 -4.442246313735344E-12 1.64176463154255E-7 -1.641705894820542E-7 -7.299014611153104E-11 peri 7.389931532022973E-15 -3.58774071222835E-14 2.189429034243054E-9 -1.641705894820542E-7 1.64597987162544E-7 7.297833631678223E-11 i -5.40012410582749E-17 1.541101924333127E-16 -6.331088939726414E-14 -7.299014611153104E-11 7.297833631678223E-11 1.495998741009583E-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 MPO453478   102480 (1999 TW250)          Discovered 1999-Oct-09 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1999 TW250 = 2004 SJ30  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 14:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin