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14438 MacLean (1992 HC2)
Classification: Main-belt Asteroid          SPK-ID: 2014438
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09524406363523606 5.8075e-08  
a 2.909238599167954 2.6719e-08 au
q 2.632150892898716 1.6603e-07 au
i 3.123841676187762 6.1432e-06 deg
node 130.115933365457 0.00010391 deg
peri 230.921612859587 0.00010841 deg
M 190.1033942061998 3.0371e-05 deg
tp 2458455.861385011026
0.00015272 JED
period 1812.455859051696
n .198625526907098 2.7363e-09 deg/d
Q 3.186326305437192 2.9263e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1107  
   data-arc span      8749 days (23.95 yr)  
   first obs. used      1992-04-27  
   last obs. used      2016-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5475  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:19:16  

Additional Information
 Earth MOID = 1.62914 au 
 Jupiter MOID = 2.23389 au 
 T_jup = 3.275 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO358771  

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.arcLast Updated: 2005-04-26

Alternate Designations
 1992 HC2 = 1999 XE2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-04 09:49 UT
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