+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249635 (1999 TQ120) Classification: Main-belt Asteroid          SPK-ID: 2249635 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2773240443050688 4.8629e-08   a 2.385878611258526 1.5882e-08 au q 1.724217105563351 1.1859e-07 au i 1.942345942241951 4.9899e-06 deg node 269.9590677383126 0.00017769 deg peri 58.79449659665283 0.00017805 deg M 243.8458920733449 1.5752e-05 deg tp 2459434.813186641218 (2021-Aug-08.31318664) 6.2308e-05 TDB period 1346.080220335958 3.69 1.3441e-05 3.68e-08 d yr n .2674431988237301 2.6705e-09 deg/d Q 3.047540116953702 2.0287e-08 au   Orbit Determination Parameters    # obs. used (total)      245      data-arc span      7523 days (20.60 yr)      first obs. used      1999-09-18      last obs. used      2020-04-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60359      source      ORB      producer      Otto Matic      solution date      2020-May-21 13:46:14   Additional Information  Earth MOID = .714014 au   Jupiter MOID = 2.32111 au   T_jup = 3.481  [ 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 16.9   n/a MPO418333   249635 (1999 TQ120)          Discovered 1999-Oct-04 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 2111-Jul-04 16:55 00:15 Psych 0.0318683045402456 0.0318627650815471 0.0318738466821262 2.30634498623354 2.30634482161833 2492271.204983541 14.661709532371 542.074947745557 47.272756454775 59.8193591488545 87054.4552063958 T 12 CATAB v2.0f-lin.ifort 2020-May-21 13:46:34 2020-May-21 13:46 2123-Oct-06 06:58 < 00:01 Amphi 0.0359415601594958 0.0359331991233013 0.0359499304680055 5.47825437836947 5.47825434917276 2496747.790307086 0.68297312835809 1010.73161416363 63.168018932754 65.880801893867 77695.3727941271 T 12 CATAB v2.0f-lin.ifort 2020-May-21 13:46:34 2020-May-21 13:46 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 00:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin