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8646 (1988 TB1)
Classification: Main-belt Asteroid          SPK-ID: 2008646
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 .1496529569592255 7.0469e-08  
a 2.431015990337811 1.6643e-08 AU
q 2.067207258968597 1.6699e-07 AU
i 4.971860164066059 8.0789e-06 deg
node 208.8454543667861 6.1767e-05 deg
peri 144.4022709457352 6.649e-05 deg
M 293.3166627352275 2.6512e-05 deg
tp 2457056.945436983253
(2015-Feb-03.44543698)
0.00010347 JED
period 1384.459163274992
3.79
1.4217e-05
3.892e-08
d
yr
n .2600293382062683 2.6703e-09 deg/d
Q 2.794824721707024 1.9134e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      904  
   data-arc span      21329 days (58.40 yr)  
   first obs. used      1954-12-21  
   last obs. used      2013-05-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60429  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 16:00:44  

Additional Information
 Earth MOID = 1.06341 AU 
 T_jup = 3.487 
[ 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 14.3 mag n/a MPO263426  

8646 (1988 TB1)          Discovered 1988-Oct-13 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: 19980511/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1988 TB1 = 1991 KH2 = 1992 WC4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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