+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19976 (1989 TD) Classification: Main-belt Asteroid          SPK-ID: 2019976 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2560538017274956 3.2737e-08   a 2.321858341964302 9.3939e-09 au q 1.727337686431643 7.5381e-08 au i 3.010463398060365 3.6885e-06 deg node 306.3412789137406 7.303e-05 deg peri 51.33290767855438 7.3692e-05 deg M 302.525119610546 1.4036e-05 deg tp 2459406.813469113773 (2021-Jul-11.31346911) 5.1375e-05 TDB period 1292.266262716512 3.54 7.8425e-06 2.147e-08 d yr n .2785803594711457 1.6906e-09 deg/d Q 2.916378997496961 1.1799e-08 au   Orbit Determination Parameters    # obs. used (total)      1009      data-arc span      13767 days (37.69 yr)      first obs. used      1982-10-14      last obs. used      2020-06-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51244      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:10:33   Additional Information  Earth MOID = .723587 au   Jupiter MOID = 2.54388 au   T_jup = 3.531  [ 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 15.34   n/a E2021B10   diameter diameter 2.038 km 0.381 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.466   0.223 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19976 (1989 TD)          Discovered 1989-Oct-04 by Baur, J. M. at Chions Reference: 20010109/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1989 TD = 1982 TN1 = 1982 VF6  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 10:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin