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

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07534340407697139 4.1878e-08  
a 3.146930675880232 1.5836e-08 au
q 2.909830206365171 1.3004e-07 au
i 13.97065793328065 4.8044e-06 deg
node 283.4854051171044 1.8467e-05 deg
peri 106.5497053296769 4.0186e-05 deg
M 102.1033732613976 3.3956e-05 deg
tp 2458422.181906066223
(2018-Oct-30.68190607)
0.00019247 TDB
period 2039.056175775458
5.58
1.5391e-05
4.214e-08
d
yr
n .1765522717210531 1.3327e-09 deg/d
Q 3.384031145395293 1.7029e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2277  
   data-arc span      33056 days (90.50 yr)  
   first obs. used      1929-11-22  
   last obs. used      2020-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42121  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:22:06  

Additional Information
 Earth MOID = 1.9559 au 
 Jupiter MOID = 1.99191 au 
 T_jup = 3.159 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.4   n/a MPO502164  
diameter diameter 23.681 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.105   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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