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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07513478018123476 1.0027e-07  
a 1.925077959124984 9.1684e-09 AU
q 1.780437649834389 1.9231e-07 AU
i 19.93362854028537 1.1595e-05 deg
node 217.7175326565892 1.4445e-05 deg
peri 145.8100902014754 5.2578e-05 deg
M 172.2898637769359 4.8912e-05 deg
tp 2456533.595417706147
(2013-Aug-29.09541771)
0.00013247 JED
period 975.5980180204212
2.67
6.9696e-06
1.908e-08
d
yr
n .3690044396876424 2.6361e-09 deg/d
Q 2.06971826841558 9.8573e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      687  
   data-arc span      9285 days (25.42 yr)  
   first obs. used      1989-10-27  
   last obs. used      2015-03-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49264  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:30:16  

Additional Information
 Earth MOID = .7997 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 14.8 mag n/a MPO263420  
rotation period rot_per 2.2981 h n/a LCDB (Rev. 2015-Feb); 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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