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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09308878109517325 5.0919e-08  
a 2.628398832063975 1.1029e-08 au
q 2.383724388555162 1.3815e-07 au
i 12.79077035746291 4.424e-06 deg
node 169.0636703209309 1.5439e-05 deg
peri 10.97929561346079 2.4667e-05 deg
M 338.4974812802572 1.8994e-05 deg
tp 2459093.465574796894
(2020-Aug-31.96557480)
8.2204e-05 TDB
period 1556.45054251961
4.26
9.7969e-06
2.682e-08
d
yr
n .231295495851237 1.4559e-09 deg/d
Q 2.873073275572787 1.2056e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2349  
   data-arc span      17776 days (48.67 yr)  
   first obs. used      1971-10-13  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43691  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:19:39  

Additional Information
 Earth MOID = 1.38902 au 
 Jupiter MOID = 2.08847 au 
 T_jup = 3.360 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456898.5 (2014-Aug-29.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0938092493148675 5.0915e-08  
q 2.381223320865037 1.3815e-07 au
tp 2457539.400921036835
(2016-May-30.90092104)
8.0911e-05 TDB
node 169.090246852707 1.5438e-05 deg
peri 11.56230633958493 2.4552e-05 deg
i 12.79157283367677 4.4249e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2349  
   data-arc span      17776 days (48.67 yr)  
   first obs. used      1971-10-13  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43691  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:19:39  

Additional Information
 Jupiter MOID = 2.08847 au 
 T_jup = 3.360 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.592306216417045E-15 -7.01871448994686E-15 -5.145390138539444E-13 -1.144650378289201E-14 1.697588701531076E-14 -2.26223589148988E-15
q -7.01871448994686E-15 1.90863981067629E-14 1.376636307847905E-12 3.087275755387804E-14 -5.93470589233516E-14 6.248917205400284E-15
tp -5.145390138539444E-13 1.376636307847905E-12 6.546655909115741E-9 2.403623112898993E-12 1.537166861334342E-9 4.548490408249239E-12
node -1.144650378289201E-14 3.087275755387804E-14 2.403623112898993E-12 2.383419701140166E-10 -2.318886420018671E-10 -1.378970151270767E-12
peri 1.697588701531076E-14 -5.93470589233516E-14 1.537166861334342E-9 -2.318886420018671E-10 6.027991780197203E-10 2.347174146399004E-12
i -2.26223589148988E-15 6.248917205400284E-15 4.548490408249239E-12 -1.378970151270767E-12 2.347174146399004E-12 1.958001582011724E-11

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 12.6   n/a MPO502205  
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. 2019-August); 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

[ show close-approach data ]
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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