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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07431515971371543 5.4843e-08  
a 3.145996685013722 2.2261e-08 au
q 2.912201438908108 1.7055e-07 au
i 13.96935973849867 5.759e-06 deg
node 283.5105791780501 2.6189e-05 deg
peri 107.1140465653364 4.9829e-05 deg
M 178.9461848688508 4.1636e-05 deg
tp 2456387.391962681184
(2013-Apr-04.89196268)
0.00023372 JED
period 2038.148472972895
5.58
2.1633e-05
5.923e-08
d
yr
n .176630900434302 1.8747e-09 deg/d
Q 3.379791931119336 2.3915e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1026  
   data-arc span      31303 days (85.70 yr)  
   first obs. used      1929-11-22  
   last obs. used      2015-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55572  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 13:59:58  

Additional Information
 Earth MOID = 1.95679 au 
 Jupiter MOID = 1.99838 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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