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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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07261395641516566 8.0262e-08  
a 3.231424974431837 4.922e-08 AU
q 2.996778422179565 2.6352e-07 AU
i 7.22344358937158 9.3282e-06 deg
node 10.99954976574014 4.9551e-05 deg
peri 325.3306637116752 7.474e-05 deg
M 339.0379651382354 6.3782e-05 deg
tp 2456924.043664981795
(2014-Sep-23.54366498)
0.00037747 JED
period 2121.727193316102
5.81
4.8476e-05
1.327e-07
d
yr
n .1696730857454613 3.8766e-09 deg/d
Q 3.466071526684108 5.2794e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1104  
   data-arc span      12283 days (33.63 yr)  
   first obs. used      1980-10-10  
   last obs. used      2014-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46764  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:38:53  

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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