+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   150917 (2001 TD44) Classification: Main-belt Asteroid          SPK-ID: 2150917 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1805786864702144 7.1491e-08   a 2.638160092644165 2.2569e-08 au q 2.161764608416343 1.8554e-07 au i 14.45740933801582 5.9475e-06 deg node 41.57140186738605 2.2701e-05 deg peri 300.0156689618474 3.3514e-05 deg M 240.1056234811204 3.492e-05 deg tp 2459721.750469832400 (2022-May-22.25046983) 0.00015592 TDB period 1565.129029301177 4.29 2.0084e-05 5.499e-08 d yr n .2300129850385169 2.9515e-09 deg/d Q 3.114555576871988 2.6644e-08 au   Orbit Determination Parameters    # obs. used (total)      614      data-arc span      6792 days (18.60 yr)      first obs. used      2001-10-14      last obs. used      2020-05-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55761      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:20:36   Additional Information  Earth MOID = 1.19387 au   Jupiter MOID = 2.44449 au   T_jup = 3.329  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.94   n/a E2021B55   150917 (2001 TD44)          Discovered 2001-Oct-14 by LINEAR at Socorro Reference: 20070303/Numbers.arc Last Updated: 2007-03-07 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-21 23:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin