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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06259489377905783 5.9559e-08  
a 2.293184271708837 1.2809e-08 au
q 2.149642645805417 1.3753e-07 au
i 7.605485438360027 7.4416e-06 deg
node 6.254823981019364 3.8907e-05 deg
peri 116.3440754304488 6.9395e-05 deg
M 358.5006722219007 6.0964e-05 deg
tp 2457405.782639142108
(2016-Jan-18.28263914)
0.00021482 JED
period 1268.401825763427
3.47
1.0627e-05
2.91e-08
d
yr
n .2838217295874065 2.378e-09 deg/d
Q 2.436725897612258 1.3611e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1013  
   data-arc span      22544 days (61.72 yr)  
   first obs. used      1954-04-02  
   last obs. used      2015-12-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53178  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:06:00  

Additional Information
 Earth MOID = 1.17643 au 
 Jupiter MOID = 2.59132 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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