Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06236831454369143 6.2748e-08  
a 2.293481284708436 1.4738e-08 AU
q 2.150440722543671 1.4348e-07 AU
i 7.604618244848372 9.6319e-06 deg
node 6.258341703845213 4.9326e-05 deg
peri 116.0920927194344 9.8853e-05 deg
M 188.4468859689649 8.5544e-05 deg
tp 2457405.057109398005
(2016-Jan-17.55710940)
0.00030288 JED
period 1268.648258660633
3.47
1.2229e-05
3.348e-08
d
yr
n .2837665976699228 2.7353e-09 deg/d
Q 2.436521846873201 1.5657e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      821  
   data-arc span      21623 days (59.20 yr)  
   first obs. used      1954-04-02  
   last obs. used      2013-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51043  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 15:51:39  

Additional Information
 Earth MOID = 1.17728 AU 
 T_jup = 3.582 
[ 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 13.7 mag n/a MPO263420  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-21 02:03 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin