+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15045 Walesdymond (1998 XY21) Classification: Main-belt Asteroid          SPK-ID: 2015045 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05139318555171033 3.2569e-08   a 2.777027097760553 1.09e-08 au q 2.634306828843218 8.8565e-08 au i 1.577383755429858 3.5137e-06 deg node 115.1152787255094 0.00015331 deg peri 185.3056901544874 0.00015882 deg M 35.82852319423509 4.1222e-05 deg tp 2458832.273267396409 (2019-Dec-14.77326740) 0.00019354 TDB period 1690.318727595147 4.63 9.9516e-06 2.725e-08 d yr n .2129775847139668 1.2539e-09 deg/d Q 2.919747366677889 1.146e-08 au   Orbit Determination Parameters    # obs. used (total)      1322      data-arc span      10755 days (29.45 yr)      first obs. used      1991-06-04      last obs. used      2020-11-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54105      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:58:39   Additional Information  Earth MOID = 1.61866 au   Jupiter MOID = 2.18249 au   T_jup = 3.332  [ 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 14.7   n/a MPO435841   diameter diameter 6.439 km 0.248 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.062   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15045 Walesdymond           Discovered 1998 Dec. 10 by Spacewatch at Kitt Peak. William Wales and Joseph Dymond were two young Yorkshire men sent to the shores of Hudson Bay by the Royal Society of London to observe the transit of Venus on 1769 June 3. They stayed for over a year at Fort Prince of Wales, near modern-day Churchill, Manitoba. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030614/MPCPages.arc Last Updated: 2005-04-26 [ show close-approach data ] Alternate Designations  1998 XY21 = 1992 SY5 = 1995 EE6  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 05:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin