+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15577 Gywilliams (2000 GN68) Classification: Main-belt Asteroid          SPK-ID: 2015577 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1184600884670998 3.301e-08   a 2.217995518804059 7.065e-09 au q 1.955251573426899 7.2343e-08 au i 2.165762384964276 3.8924e-06 deg node 189.3562248780481 0.00010954 deg peri 35.99999915716177 0.0001111 deg M 21.04873069702936 1.8112e-05 deg tp 2458929.955552842704 (2020-Mar-21.45555284) 6.0695e-05 TDB period 1206.533607283545 3.30 5.7648e-06 1.578e-08 d yr n .2983754433583691 1.4256e-09 deg/d Q 2.480739464181219 7.902e-09 au   Orbit Determination Parameters    # obs. used (total)      737      data-arc span      14703 days (40.25 yr)      first obs. used      1980-03-16      last obs. used      2020-06-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56949      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:51:23   Additional Information  Earth MOID = .946451 au   Jupiter MOID = 2.49532 au   T_jup = 3.642  [ 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 16.3   n/a MPO425958   diameter diameter 1.767 km 0.227 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.225   0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15577 Gywilliams           Discovered 2000 Apr. 5 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Named in honor of Genevieve Y. Williams for achievement as a finalist in the 2001 Discovery Young Scientist Challenge (DYSC), a middle school science competition. Genevieve is a student at the Palos Verdes Intermediate School, Palos Verdes, California. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20011002/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] Alternate Designations  2000 GN68 = 1980 FD1 = 1994 RE13  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-28 12:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin