+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18560 Coxeter (1997 EO7) Classification: Main-belt Asteroid          SPK-ID: 2018560 [ 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 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1878467059225739 3.7514e-08   a 3.143765143442055 1.9248e-08 au q 2.553219217052257 1.2415e-07 au i 9.282560061773308 4.8194e-06 deg node 328.5876172352881 2.3896e-05 deg peri 325.668702443336 2.7042e-05 deg M 317.8974797938911 1.4128e-05 deg tp 2459438.610836452081 (2021-Aug-12.11083645) 8.0742e-05 TDB period 2035.980285814618 5.57 1.8698e-05 5.119e-08 d yr n .1768190009049916 1.6239e-09 deg/d Q 3.734311069831854 2.2864e-08 au   Orbit Determination Parameters    # obs. used (total)      1935      data-arc span      8587 days (23.51 yr)      first obs. used      1997-01-09      last obs. used      2020-07-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45434      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:31:53   Additional Information  Earth MOID = 1.54191 au   Jupiter MOID = 1.55578 au   T_jup = 3.162  [ 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 12.78   n/a E2021B10   diameter diameter 18.465 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.036   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18560 Coxeter           Discovered 1997 Mar. 7 by P. G. Comba at Prescott. Harold Scott MacDonald Coxeter (b. 1907) is an English-Canadian mathematician and former professor at the University of Toronto. He has been a prolific writer on intuitively simple geometric problems, such as the classification of polytopes and the tiling of the plane with convex polygons. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010309/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-23 15:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin