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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07197629501880742 5.5589e-08  
a 3.151554942138258 2.3273e-08 AU
q 2.924717693854935 1.7396e-07 AU
i 13.98848557226747 6.147e-06 deg
node 283.6067585465555 2.7141e-05 deg
peri 107.936662766493 5.4826e-05 deg
M 72.33627099931462 4.5259e-05 deg
tp 2456389.880691842279
(2013-Apr-07.38069184)
0.00025692 JED
period 2043.552271835799
5.59
2.2636e-05
6.197e-08
d
yr
n .1761638324409479 1.9513e-09 deg/d
Q 3.378392190421582 2.4948e-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 = 1.96918 AU 
 T_jup = 3.157 
[ 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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