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8031 Williamdana (1992 ER)
Classification: Main-belt Asteroid          SPK-ID: 2008031
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0623530502783138 1.9555e-08  
a 2.29356183664424 6.6928e-09 au
q 2.15055126012754 4.3682e-08 au
i 7.603930942232873 3.242e-07 deg
node 6.226268919846382 2.4757e-06 deg
peri 115.838004310804 1.1242e-05 deg
M 149.8942363895645 9.4902e-06 deg
tp 2458672.241443158243
(2019-Jul-07.74144316)
3.3101e-05 TDB
period 1268.715095681105
3.47
5.5533e-06
1.52e-08
d
yr
n .2837516485974618 1.242e-09 deg/d
Q 2.43657241316094 7.1101e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2151  
   data-arc span      24249 days (66.39 yr)  
   first obs. used      1954-04-02  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46037  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:14:43  

Additional Information
 Earth MOID = 1.1774 au 
 Jupiter MOID = 2.58661 au 
 T_jup = 3.582 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.90   n/a E2021B10  

8031 Williamdana           Discovered 1992 Mar. 7 by S. Ueda and H. Kaneda at Kushiro.
NASA research pilot William Dana (b. 1930) was the eleventh pilot to fly the X-15 and made a total of 16 flights. These included a 1967 flight to 93500 meters and he received NASA astronaut wings in 2005. Dana made the 199th and final X-15 flight in 1968 and subsequently flew the M2-F3 and HL-10 lifting bodies.
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
 1992 ER = 1976 SH = 1978 CE = 1978 ES4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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