+ 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 | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1053283654328015 2.38e-08   a 2.407187843397576 7.054e-09 au q 2.153642682562799 5.7735e-08 au i 4.646220884139284 1.4448e-06 deg node 161.0352604846549 1.1597e-05 deg peri 57.68020193419817 1.6764e-05 deg M 300.2889030195176 1.1833e-05 deg tp 2459426.764254094023 (2021-Jul-31.26425409) 4.5231e-05 TDB period 1364.153994700072 3.73 5.9962e-06 1.642e-08 d yr n .2638998246522388 1.16e-09 deg/d Q 2.660733004232353 7.7969e-09 au   Orbit Determination Parameters    # obs. used (total)      2366      data-arc span      15894 days (43.52 yr)      first obs. used      1977-09-08      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50029      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:17:16   Additional Information  Earth MOID = 1.14953 au   Jupiter MOID = 2.30981 au   T_jup = 3.510  [ 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 14.05   n/a E2021B10   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 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-14 18:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin