+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17889 Liechty (1999 DH3) Classification: Main-belt Asteroid          SPK-ID: 2017889 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1051847409307158 2.3446e-08   a 2.406768640053743 6.4537e-09 au q 2.153613304169519 5.7254e-08 au i 4.646531602928633 1.4433e-06 deg node 161.036013198592 1.156e-05 deg peri 57.72009971910907 1.6389e-05 deg M 351.9759402975245 1.0544e-05 deg tp 2459426.897760822328 (2021-Jul-31.39776082) 3.9978e-05 TDB period 1363.797666243925 3.73 5.4855e-06 1.502e-08 d yr n .2639687755086768 1.0617e-09 deg/d Q 2.659923975937967 7.1326e-09 au   Orbit Determination Parameters    # obs. used (total)      2641      data-arc span      15994 days (43.79 yr)      first obs. used      1977-09-08      last obs. used      2021-06-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48422      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 04:31:07   Additional Information  Earth MOID = 1.15114 au   Jupiter MOID = 2.30957 au   T_jup = 3.510  [ 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 14.06   n/a MPCxxxxx   diameter diameter 3.488 km 0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.458   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17889 Liechty           Discovered 1999 Feb. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Anthony David Liechty (b. 1984) was awarded third place in the 2003 Intel International Science and Engineering Fair for his engineering project. He attends the Leo Junior-Senior High School, Leo, Indiana, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20040614/MPCPages.arc Last Updated: 2009-12-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-29 20:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin