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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07521529041991476 9.415e-08  
a 1.925125118623982 8.0396e-09 au
q 1.780326273732006 1.8176e-07 au
i 19.93482132765888 1.0742e-05 deg
node 217.7107850593723 1.2227e-05 deg
peri 145.6654550372223 5.1018e-05 deg
M 33.84529132304899 4.8448e-05 deg
tp 2457508.776076449757
(2016-Apr-30.27607645)
0.00013122 JED
period 975.6338677339158
2.67
6.1116e-06
1.673e-08
d
yr
n .3689908806017204 2.3114e-09 deg/d
Q 2.069923963515958 8.6443e-09 au
  Orbit Determination Parameters
   # obs. used (total)      799  
   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      .48535  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:27:35  

Additional Information
 Earth MOID = .798544 au 
 Jupiter MOID = 3.17166 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 372. h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2011) Minor Planet Bul. 38, 33-36.]
[Warner, B.D. (2015) Minor Planet Bul. 42, 267-276.]

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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