+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09678312939342468 4.2421e-08   a 2.906370027097915 1.5997e-08 au q 2.625082440700127 1.2433e-07 au i 3.123818279323191 4.69e-06 deg node 130.0550962939825 7.6628e-05 deg peri 231.8438704420526 7.9919e-05 deg M 107.7172993691257 2.1265e-05 deg tp 2458458.988428205675 (2018-Dec-06.48842821) 0.00010782 TDB period 1809.775839049978 4.95 1.4942e-05 4.091e-08 d yr n .1989196629948259 1.6423e-09 deg/d Q 3.187657613495704 1.7545e-08 au   Orbit Determination Parameters    # obs. used (total)      1646      data-arc span      10418 days (28.52 yr)      first obs. used      1992-04-27      last obs. used      2020-11-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53343      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:56:38   Additional Information  Earth MOID = 1.62343 au   Jupiter MOID = 2.24864 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 13.9   n/a MPO502279   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-Jan-23 15:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin