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8026 Johnmckay (1991 JA1)
Classification: Inner Main-belt Asteroid          SPK-ID: 2008026
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07522346252009983 9.4583e-08  
a 1.925129676461972 8.0447e-09 au
q 1.780314756398303 1.8258e-07 au
i 19.93398532807623 1.0788e-05 deg
node 217.7128213798234 1.233e-05 deg
peri 145.7172278260464 5.113e-05 deg
M 320.0010918803923 4.8451e-05 deg
tp 2457508.901188950352
(2016-Apr-30.40118895)
0.0001314 JED
period 975.6373325350047
2.67
6.1155e-06
1.674e-08
d
yr
n .368989570196755 2.3129e-09 deg/d
Q 2.06994459652564 8.6499e-09 au
  Orbit Determination Parameters
   # obs. used (total)      796  
   data-arc span      9427 days (25.81 yr)  
   first obs. used      1989-10-27  
   last obs. used      2015-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48486  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Oct-05 13:35:34  

Additional Information
 Earth MOID = .79834 au 
 Jupiter MOID = 3.17099 au 
 T_jup = 3.843 
[ 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 14.9 mag n/a MPO337323  
rotation period rot_per 2.2981 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2011) Minor Planet Bul. 38, 33-36.]

8026 Johnmckay           Discovered 1991 May 8 by E. F. Helin at Palomar.
NASA research pilot John McKay (1922-1975) was the fifth pilot to fly the X-15 and made a total of 29 flights. Before joining the X-15 program, he made 46 flights in the X-1 and D-558-II Skyrocket. In 2005 McKay received posthumous NASA astronaut wings for a flight that reached an altitude of 89900 metres.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120207/MPCPages.arcLast Updated: 2012-02-09

Alternate Designations
 1991 JA1 = 1989 UF2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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