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1138 Attica (1929 WF)
Classification: Main-belt Asteroid          SPK-ID: 2001138
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07456141095140759 5.4365e-08  
a 3.145358570329663 2.181e-08 au
q 2.910836197377781 1.6946e-07 au
i 13.97058518907447 5.6693e-06 deg
node 283.5014643903207 2.6004e-05 deg
peri 107.0603733292236 4.8765e-05 deg
M 214.3573580360793 4.0913e-05 deg
tp 2458424.808385236257
(2018-Nov-02.30838524)
0.00023396 JED
period 2037.528396103698
5.58
2.1192e-05
5.802e-08
d
yr
n .1766846541566816 1.8377e-09 deg/d
Q 3.379880943281545 2.3436e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1054  
   data-arc span      31555 days (86.39 yr)  
   first obs. used      1929-11-22  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55538  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:32:14  

Additional Information
 Earth MOID = 1.95535 au 
 Jupiter MOID = 1.9977 au 
 T_jup = 3.159 
[ 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 11.4 mag n/a MPO319096  

1138 Attica (1929 WF)          Discovered 1929-Nov-22 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1929 WF = 1954 GK 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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