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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 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06234250910695925 6.4725e-08  
a 2.293109989764323 1.5068e-08 AU
q 2.150151759344181 1.4881e-07 AU
i 7.605180721114618 9.7393e-06 deg
node 6.271043852583449 5.0515e-05 deg
peri 115.8571547595319 0.00010022 deg
M 75.17197938124163 8.5836e-05 deg
tp 2456135.656547002558
(2012-Jul-27.15654700)		 0.00030187 JED
period 1268.340196225713
3.47		 1.2502e-05
3.423e-08		 d
yr
n .2838355206838645 2.7977e-09 deg/d
Q 2.436068220184465 1.6008e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      806  
   data-arc span      21567 days (59.05 yr)  
   first obs. used      1954-04-02  
   last obs. used      2013-04-19  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .50547  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:29:14  

Additional Information
 Earth MOID = 1.1767 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 14.0 mag n/a PDS3 (MPC 30859)  

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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