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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0722115022996543 5.695e-08  
a 3.229074187092546 2.8721e-08 au
q 2.995897889005558 1.7901e-07 au
i 7.224838411451687 6.1663e-06 deg
node 10.99647168364921 3.7878e-05 deg
peri 324.8778675320608 5.2304e-05 deg
M 115.3011004230145 3.5369e-05 deg
tp 2456921.692842962272
(2014-Sep-21.19284296)
0.00020928 JED
period 2119.41235284867
5.80
2.8277e-05
7.742e-08
d
yr
n .1698584041544013 2.2662e-09 deg/d
Q 3.462250485179533 3.0795e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1583  
   data-arc span      12936 days (35.42 yr)  
   first obs. used      1980-10-10  
   last obs. used      2016-03-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50434  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:58:35  

Additional Information
 Earth MOID = 1.98977 au 
 Jupiter MOID = 1.88647 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 12.0 mag n/a MPO365346  

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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