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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07296997859442246 5.5628e-08  
a 3.150529986600599 2.452e-08 AU
q 2.920635880917267 1.7503e-07 AU
i 13.97601431411269 6.1434e-06 deg
node 283.5802571755269 2.719e-05 deg
peri 107.6918087105975 5.4216e-05 deg
M 107.7383149587907 4.4553e-05 deg
tp 2456389.218107415702
(2013-Apr-06.71810742)
0.00025277 JED
period 2042.555440137703
5.59
2.3846e-05
6.529e-08
d
yr
n .1762498059664563 2.0576e-09 deg/d
Q 3.38042409228393 2.631e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      931  
   data-arc span      30796 days (84.31 yr)  
   first obs. used      1929-11-22  
   last obs. used      2014-03-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57005  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:15:51  

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 11.3 mag n/a PDS3 (MPC 17261)  

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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