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5382 McKay (1991 JR2)
Classification: Main-belt Asteroid          SPK-ID: 2005382
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09290816823579191 3.3549e-08  
a 2.627887481156185 1.0209e-08 au
q 2.383735268952194 9.137e-08 au
i 12.79171840070787 5.4583e-07 deg
node 169.0640129206629 3.2505e-06 deg
peri 10.97718955596081 7.5563e-06 deg
M 24.76510602198548 4.6749e-06 deg
tp 2459093.459959021031
(2020-Aug-31.95995902)
2.0165e-05 TDB
period 1555.996357060591
4.26
9.067e-06
2.482e-08
d
yr
n .231363009538191 1.3482e-09 deg/d
Q 2.872039693360176 1.1157e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2497  
   data-arc span      18051 days (49.42 yr)  
   first obs. used      1971-10-13  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43137  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:28:44  

Additional Information
 Earth MOID = 1.38859 au 
 Jupiter MOID = 2.08849 au 
 T_jup = 3.360 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.59   n/a E2021B10  
diameter diameter 10.281 km 0.819 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 21.486 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.183   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

5382 McKay           Discovered 1991 May 8 by R. H. McNaught at Siding Spring.
Named for Christopher P. McKay (b. 1954), space scientist and exobiologist at NASA-Ames Research Center. McKay has made numerous seminal contributions to planetary science and the search for zones of life in the solar system, with a special interest in Mars, Titan, comets and microbial life in hostile environments on the earth. Name suggested and citation prepared by D. I. Steel.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980411/MPCPages.arcLast Updated: 2009-11-17

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Alternate Designations
 1991 JR2 = 1952 DK1 = 1971 TK2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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