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JPL Small-Body Database Browser
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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0751168059652586 4.5174e-08  
a 3.147221389944119 1.6791e-08 au
q 2.910812171465975 1.4267e-07 au
i 13.96982433172521 4.8461e-06 deg
node 283.4858423176191 2.0843e-05 deg
peri 106.6975249459753 4.1649e-05 deg
M 31.37026770739096 3.4151e-05 deg
tp 2458422.792772055392
(2018-Oct-31.29277206)
0.00019354 TDB
period 2039.338734906179
5.58
1.632e-05
4.468e-08
d
yr
n .1765278096463763 1.4127e-09 deg/d
Q 3.383630608422262 1.8052e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1927  
   data-arc span      32884 days (90.03 yr)  
   first obs. used      1929-11-22  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44838  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:54:37  

Additional Information
 Earth MOID = 1.95625 au 
 Jupiter MOID = 1.99165 au 
 T_jup = 3.158 
[ 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 11.5   n/a MPO431506  
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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