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8030 Williamknight (1991 SK)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008030
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07224150815751681 5.9143e-08  
a 3.22959265043282 2.9116e-08 au
q 2.996282006631121 1.8752e-07 au
i 7.224839341300046 6.5362e-06 deg
node 10.99655456461894 3.8678e-05 deg
peri 325.0130133045795 5.2981e-05 deg
M 81.19039083951934 3.5424e-05 deg
tp 2456922.396216777254
(2014-Sep-21.89621678)
0.00020945 JED
period 2119.922815747929
5.80
2.8668e-05
7.849e-08
d
yr
n .1698175034136743 2.2964e-09 deg/d
Q 3.462903294234519 3.1219e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1506  
   data-arc span      12853 days (35.19 yr)  
   first obs. used      1980-10-10  
   last obs. used      2015-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49293  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:06:00  

Additional Information
 Earth MOID = 1.98894 au 
 Jupiter MOID = 1.8855 au 
 T_jup = 3.170 
[ 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 11.9 mag n/a MPO309214  

8030 Williamknight           Discovered 1991 Sept. 29 by R. H. McNaught at Siding Spring.
Air Force test pilot William Knight (1929-2004) was the tenth pilot to fly the X-15 and made a total of 16 flights. These included the fastest X-15 flight, which reached Mach 6.7, and another flight to 69600 meters for which he received astronaut wings.
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 SK = 1980 TU12 = 1986 UF4 = 1992 WW3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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