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8031 Williamdana (1992 ER)
Classification: Main-belt Asteroid          SPK-ID: 2008031
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06243122095018268 5.9986e-08  
a 2.293225040486874 1.5511e-08 AU
q 2.150056201295746 1.3774e-07 AU
i 7.605170122820818 8.2237e-06 deg
node 6.255435684221855 3.9826e-05 deg
peri 116.1934054831534 8.1329e-05 deg
M 245.1001055128181 7.5526e-05 deg
tp 2457405.342006792476
(2016-Jan-17.84200679)
0.00026875 JED
period 1268.435650839959
3.47
1.2869e-05
3.523e-08
d
yr
n .2838141609797926 2.8795e-09 deg/d
Q 2.436393879678002 1.6479e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      929  
   data-arc span      22169 days (60.70 yr)  
   first obs. used      1954-04-02  
   last obs. used      2014-12-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51044  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:23:58  

Additional Information
 Earth MOID = 1.17711 AU 
 T_jup = 3.583 
[ 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 13.8 mag n/a MPO309214  

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 | Physical Parameters | Discovery Circumstances ]
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