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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07261395162888506 8.1857e-08  
a 3.23142494548592 4.7914e-08 AU
q 2.996778410802033 2.6704e-07 AU
i 7.223455314576065 9.4488e-06 deg
node 10.99967307351267 5.1892e-05 deg
peri 325.3305919838724 7.736e-05 deg
M 339.0379263038576 6.5128e-05 deg
tp 2456924.043892199457
(2014-Sep-23.54389220)
0.00038534 JED
period 2121.727164807624
5.81
4.719e-05
1.292e-07
d
yr
n .1696730880252651 3.7738e-09 deg/d
Q 3.466071480169807 5.1393e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1092  
   data-arc span      7973 days (21.83 yr)  
   first obs. used      1991-08-07  
   last obs. used      2013-06-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50807  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 15:51:38  

Additional Information
 Earth MOID = 1.9902 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 11.8 mag n/a PDS3 (MPC 30859)  

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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