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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07247431189991481 7.9495e-08  
a 3.230949566661177 3.3987e-08 AU
q 2.99678872003408 2.6319e-07 AU
i 7.224041196693568 8.5492e-06 deg
node 10.99543309559961 4.6587e-05 deg
peri 325.2759060232911 6.0633e-05 deg
M 13.02588921583853 3.8428e-05 deg
tp 2456923.746431760681
(2014-Sep-23.24643176)
0.0002265 JED
period 2121.258987260338
5.81
3.3471e-05
9.164e-08
d
yr
n .1697105361306916 2.6778e-09 deg/d
Q 3.465110413288274 3.645e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1216  
   data-arc span      12464 days (34.12 yr)  
   first obs. used      1980-10-10  
   last obs. used      2014-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47248  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:11:44  

Additional Information
 Earth MOID = 1.99196 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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