+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14146 Hughmaclean (1998 SP42) Classification: Main-belt Asteroid          SPK-ID: 2014146 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1213399371545994 2.8097e-08   a 2.315686659320292 6.3511e-09 au q 2.034701385608624 6.5792e-08 au i 2.090145256983903 4.3002e-06 deg node 350.9888539531403 8.3594e-05 deg peri 72.84293527176465 8.551e-05 deg M 60.05649569537942 1.81e-05 deg tp 2458985.778464550762 (2020-May-16.27846455) 6.4556e-05 TDB period 1287.117269609072 3.52 5.2952e-06 1.45e-08 d yr n .2796947943285234 1.1507e-09 deg/d Q 2.596671933031961 7.1218e-09 au   Orbit Determination Parameters    # obs. used (total)      1618      data-arc span      25960 days (71.07 yr)      first obs. used      1949-12-22      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5354      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:16:20   Additional Information  Earth MOID = 1.04844 au   Jupiter MOID = 2.66894 au   T_jup = 3.570  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.7   n/a MPO435834   diameter diameter 2.770 km 0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.277   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   14146 Hughmaclean           Discovered 1998 Sept. 28 by Spacewatch at Kitt Peak. Hugh Noel Alexander Maclean (b. 1915) is an amateur astronomer in St. Catharines, Ontario, who helped found the Royal Astronomical Society of Canada, Niagara Centre, in 1960, and was president of the Niagara Centre during 1966-1968 and 1978-1979. He was employed as a shipping foreman. 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 Alternate Designations  1998 SP42 = 1989 AF2 = 1993 FW58  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-03 00:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin