+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14438 MacLean (1992 HC2) Classification: Main-belt Asteroid          SPK-ID: 2014438 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09714657717880819 4.2162e-08   a 2.905657693538058 1.356e-08 au q 2.623382994157565 1.2249e-07 au i 3.124079191675249 4.481e-06 deg node 130.0564278033477 7.1257e-05 deg peri 231.8797191193482 7.3578e-05 deg M 186.4374903950049 1.8831e-05 deg tp 2460268.704900383973 (2023-Nov-20.20490038) 9.55e-05 TDB period 1809.110532296623 4.95 1.2664e-05 3.467e-08 d yr n .1989928163996639 1.393e-09 deg/d Q 3.187932392918551 1.4878e-08 au   Orbit Determination Parameters    # obs. used (total)      1866      data-arc span      10633 days (29.11 yr)      first obs. used      1992-04-27      last obs. used      2021-06-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52532      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 17:17:24   Additional Information  Earth MOID = 1.62092 au   Jupiter MOID = 2.24886 au   T_jup = 3.276  [ 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 13.85   n/a MPCxxxxx   diameter diameter 4.374 km 0.545 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.306   0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   14438 MacLean           Discovered 1992 Apr. 27 by Spacewatch at Kitt Peak. Steven Glenwood MacLean (b. 1954), selected as a Canadian astronaut in 1983, is an expert in laser physics and space vision systems. He flew on space shuttle mission STS-52. 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  1992 HC2 = 1999 XE2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-31 23:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin