+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11967 Boyle (1994 PW20) Classification: Main-belt Asteroid          SPK-ID: 2011967 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02218422796373769 4.3541e-08   a 2.742988736322718 1.1056e-08 au q 2.68213764889417 1.1859e-07 au i 3.910867216264979 4.4489e-06 deg node 345.54640584 5.4897e-05 deg peri 207.6609234597306 9.9542e-05 deg M 26.39350026654992 8.1762e-05 deg tp 2458878.845283222531 (2020-Jan-30.34528322) 0.00037706 TDB period 1659.336488059282 4.54 1.0032e-05 2.747e-08 d yr n .2169541877675738 1.3117e-09 deg/d Q 2.803839823751266 1.1301e-08 au   Orbit Determination Parameters    # obs. used (total)      2110      data-arc span      10416 days (28.52 yr)      first obs. used      1992-02-01      last obs. used      2020-08-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47599      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:56:04   Additional Information  Earth MOID = 1.68137 au   Jupiter MOID = 2.15957 au   T_jup = 3.345  [ 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 13.7   n/a MPO467804   diameter diameter 4.758 km 0.293 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.341   0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11967 Boyle           Discovered 1994 Aug. 12 by E. W. Elst at the European Southern Observatory. Robert Boyle (1627-1691) was a British physicist and philosopher well known for his experiments with gases, leading to the discovery that the volume of a gas is inversely proportional to its pressure. In 1661 he developed the concept of primary particles (the critical chymist). NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030501/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1994 PW20 = 1997 ES49  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 21:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin