+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0969379533654577 4.2221e-08   a 2.906174862281306 1.4122e-08 au q 2.624456219009615 1.2292e-07 au i 3.123980723337023 4.5821e-06 deg node 130.0551024856702 7.2435e-05 deg peri 231.8575947976914 7.4993e-05 deg M 147.4736549283361 1.9374e-05 deg tp 2458459.201736589233 (2018-Dec-06.70173659) 9.7405e-05 TDB period 1809.593550506079 4.95 1.319e-05 3.611e-08 d yr n .1989397010722771 1.4501e-09 deg/d Q 3.187893505552997 1.5491e-08 au   Orbit Determination Parameters    # obs. used (total)      1772      data-arc span      10549 days (28.88 yr)      first obs. used      1992-04-27      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5281      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:29:08   Additional Information  Earth MOID = 1.62117 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 13.83   n/a E2021B10   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-Apr-13 20:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin