+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16649 (1993 TY1) Classification: Main-belt Asteroid          SPK-ID: 2016649 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1532384163851646 3.6283e-08   a 2.297950883975261 8.6068e-09 au q 1.945816529584003 8.6509e-08 au i 6.914926916074279 4.0066e-06 deg node 12.77678393317081 3.064e-05 deg peri 336.8069087586765 3.3331e-05 deg M 320.210012710684 1.4573e-05 deg tp 2459341.130926956106 (2021-May-06.63092696) 5.1781e-05 TDB period 1272.358629724718 3.48 7.1483e-06 1.957e-08 d yr n .2829390956210892 1.5896e-09 deg/d Q 2.650085238366519 9.9257e-09 au   Orbit Determination Parameters    # obs. used (total)      1937      data-arc span      14933 days (40.88 yr)      first obs. used      1979-10-16      last obs. used      2020-09-03      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45931      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 01:37:46   Additional Information  Earth MOID = .940604 au   Jupiter MOID = 2.77527 au   T_jup = 3.568  [ 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 14.49   n/a E2021B10   diameter diameter 2.627 km 0.569 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.308   0.185 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   16649 (1993 TY1)          Discovered 1993-Oct-15 by Endate, K., Watanabe, K. at Kitami Reference: 20000913/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1993 TY1 = 1979 UQ3 = 1999 GU5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-16 08:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin