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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07296997472436084 5.5115e-08  
a 3.150529989319711 2.3871e-08 AU
q 2.920635895630711 1.7262e-07 AU
i 13.9760137330657 6.0633e-06 deg
node 283.5802606479634 2.6649e-05 deg
peri 107.6918003281865 5.2988e-05 deg
M 107.7383187516215 4.3866e-05 deg
tp 2456389.218085104707
(2013-Apr-06.71808510)
0.00024858 JED
period 2042.555442781991
5.59
2.3214e-05
6.356e-08
d
yr
n .1762498057382837 2.0031e-09 deg/d
Q 3.380424083008711 2.5612e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      957  
   data-arc span      31062 days (85.04 yr)  
   first obs. used      1929-11-22  
   last obs. used      2014-12-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56591  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-07 23:49:45  

Additional Information
 Earth MOID = 1.96605 AU 
 T_jup = 3.158 
[ 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 (024)
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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