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7160 Tokunaga (1981 UQ29)
Classification: Main-belt Asteroid          SPK-ID: 2007160
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .203142757718008 4.9737e-08  
a 2.467428041734989 1.3392e-08 AU
q 1.966187904866199 1.2544e-07 AU
i 1.259307378446654 5.4907e-06 deg
node 251.246208268002 0.0004067 deg
peri 180.6190201995311 0.00040745 deg
M 13.98375664607886 2.5589e-05 deg
tp 2456345.509644447507
(2013-Feb-22.00964445)		 0.00010067 JED
period 1415.680242436745
3.88		 1.1525e-05
3.155e-08		 d
yr
n .2542947123287874 2.0702e-09 deg/d
Q 2.968668178603779 1.6112e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      1147  
   data-arc span      22881 days (62.64 yr)  
   first obs. used      1950-08-14  
   last obs. used      2013-04-06  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .58463  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:25:12  

Additional Information
 Earth MOID = .980099 AU 
 T_jup = 3.457 
[ 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 13.4 mag n/a PDS3 (MPC 27895)  

7160 Tokunaga           Discovered 1981 Oct. 24 by S. J. Bus at Palomar.
University of Hawaii astronomer Alan T. Tokunaga (b. 1949) specializes in studies of star formation and solar system astronomy and in the development of infrared instrumentation. Since Apr. 2000 he has served as division chief for the NASA Infrared Telescope Facility on Mauna Kea.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050721/MPCPages.arcLast Updated: 2005-07-21

Alternate Designations
 1981 UQ29 = 1971 DX1 = 1971 FP = 1977 TT5 = 1981 SC5 = 1983 ET1 = 1994 AR 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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