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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09693795368828871 4.2209e-08  
a 2.906174861584432 1.3991e-08 au
q 2.624456217442092 1.2283e-07 au
i 3.1239808955961 4.5653e-06 deg
node 130.0550997229964 7.216e-05 deg
peri 231.8575986343054 7.4668e-05 deg
M 147.4736541430216 1.9256e-05 deg
tp 2458459.201740803368
(2018-Dec-06.70174080)
9.6727e-05 TDB
period 1809.593549855193
4.95
1.3067e-05
3.578e-08
d
yr
n .198939701143833 1.4366e-09 deg/d
Q 3.187893505726773 1.5347e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1803  
   data-arc span      10558 days (28.91 yr)  
   first obs. used      1992-04-27  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 01:47:00  

Additional Information
 Earth MOID = 1.62117 au 
 Jupiter MOID = 2.24886 au 
 T_jup = 3.276 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456835.5 (2014-Jun-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09545337918683196 4.2351e-08  
q 2.627665228887399 1.2297e-07 au
tp 2456636.063814428225
(2013-Dec-09.56381443)
9.8889e-05 TDB
node 130.1473957814736 7.2009e-05 deg
peri 229.3484266414481 7.4594e-05 deg
i 3.12574747564062 4.5725e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1803  
   data-arc span      10558 days (28.91 yr)  
   first obs. used      1992-04-27  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 01:47:00  

Additional Information
 Jupiter MOID = 2.24886 au 
 T_jup = 3.276 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.793649001379153E-15 -5.181121701735752E-15 -9.574831805638445E-13 1.083983268138092E-14 -1.829178317498852E-13 4.249404304021751E-16
q -5.181121701735752E-15 1.512169674842481E-14 2.648361646517617E-12 -3.116809847311141E-14 5.0767416602514E-13 -1.184134984575744E-15
tp -9.574831805638445E-13 2.648361646517617E-12 9.779090635185028E-9 -9.357670227109447E-12 1.943803375797987E-9 1.480101739414154E-12
node 1.083983268138092E-14 -3.116809847311141E-14 -9.357670227109447E-12 5.185350465048426E-9 -5.179111940529807E-9 9.082854468124773E-11
peri -1.829178317498852E-13 5.0767416602514E-13 1.943803375797987E-9 -5.179111940529807E-9 5.564233105718675E-9 -9.039628688992469E-11
i 4.249404304021751E-16 -1.184134984575744E-15 1.480101739414154E-12 9.082854468124773E-11 -9.039628688992469E-11 2.090750854868896E-11

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.arcLast Updated: 2005-04-26

Alternate Designations
 1992 HC2 = 1999 XE2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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