PDS_VERSION_ID                   = PDS3                                       
                                                                              
OBJECT                           = DATA_SET                                   
 DATA_SET_ID                     = "A-5-DDR-POLE-POSITION-V2.0"               
 DATA_SET_LOCAL_ID               = "POLE"                                     
                                                                              
 OBJECT                          = DATA_SET_INFORMATION                       
  DATA_SET_NAME                  = "ASTEROID POLE POSITIONS V2.0"             
  DATA_SET_COLLECTION_MEMBER_FLG = "N"                                        
  DATA_OBJECT_TYPE               = TABLE                                      
  START_TIME                     = 1932                                       
  STOP_TIME                      = 1994                                       
  DATA_SET_RELEASE_DATE          = 1995-03-31  /* Peer Review Date */         
  PRODUCER_FULL_NAME             = "PER MAGNUSSEN"                            
  DETAILED_CATALOG_FLAG          = "N"                                        
  DATA_SET_DESC                  = "                                          
                                                                              
Data Set Overview                                                             
=================                                                             
                                                                              
This is a tabulation of determinations of asteroid pole orientations          
gathered from the literature from 1932 through 1994.  It is an updated        
(Feb. 1995) version of the tabulation given in Magnussen (1989) in the        
Asteroids II book.  This version contains 431 entries on 94 different         
asteroids.  For more information about the Uppsala Asteroid Database, of      
which this collection is a part, see Magnusson et al. 1993 (reference         
given below).                                                                 
                                                                              
Parameters                                                                    
==========                                                                    
                                                                              
The data table 'pole.tab' contains an entry for each published                
determination of asteroid spin, plus an additional synthesis entry            
for each asteroid for which such a synthesis is warranted.  Each              
entry has fields for the following parameters.  Asteroid catalog              
number, a code for the type of data used to make the determination,           
four solutions for the asteroid spin direction (including rejection           
flag and pole latitude and longitude), sidereal period, flag for              
shape model, axial ratios, reference code, and notes.                         
                                                                              
Processing                                                                    
==========                                                                    
                                                                              
The data have been taken from the published literature and no additional      
processing has been applied.                                                  
                                                                              
Data                                                                          
====                                                                          
                                                                              
The data are included in a single ASCII data table, 'pole.tab'.               
                                                                              
Ancillary Data                                                                
==============                                                                
                                                                              
The dataset also includes a table of full references to the original          
papers in which the data was published.  The references file is               
'poleref.tab'.  Each entry in the data table includes a pointer to            
the reference file giving the reference of the original paper for that        
entry.                                                                        
                                                                              
Media/Format                                                                  
============                                                                  
                                                                              
This dataset is released in the form of ASCII files which may be stored       
on disk or other magnetic medium and which may be distributed by ftp,         
email, real-time access by remote login, or by whatever means is most         
convenient.                                                                   
                                                                              
"                                                                             
  CONFIDENCE_LEVEL_NOTE          = "                                          
                                                                              
Confidence Level Overview                                                     
=========================                                                     
                                                                              
This is a comprehensive tabulation of determinations of asteroid pole         
orientations and senses of rotation.  No weeding out of vague or              
uncertain results has been made.                                              
                                                                              
Review                                                                        
======                                                                        
                                                                              
This dataset underwent a formal external review on March 31, 1995.            
                                                                              
Data Coverage and Quality                                                     
=========================                                                     
                                                                              
The dataset includes data on asteroid pole directions published through       
1994.  Supplementary information on shape models, albedo models, and          
sidereal period is included, but this dataset is not intended to be a         
comprehensive compilation of those parameters.  For some asteroids, a         
large number of independent solutions have been published, which may          
not be in agreement with one another.  The dataset compiler, Per              
Magnussen, has provided also a synthesis entry where possible.  The           
synthesis entry is estimated to have an accuracy in the spin vector           
of 10 degrees or less.  They were obtained by taking averages of the          
most recent independent results, with weights based on the method used        
and the amount and type of the input data.  This procedure is necessarily     
somewhat subjective and cannot replace a careful evaluation of the original   
results.                                                                      
                                                                              
Limitations                                                                   
===========                                                                   
                                                                              
This dataset is intended only to collect data reported in the published       
literature on asteroid pole directions.                                       
                                                                              
"                                                                             
 END_OBJECT                      = DATA_SET_INFORMATION                       
                                                                              
 OBJECT                          = DATA_SET_TARGET                            
  TARGET_NAME                    = ASTEROID                                   
 END_OBJECT                      = DATA_SET_TARGET                            
                                                                              
 OBJECT                          = DATA_SET_HOST                              
  INSTRUMENT_HOST_ID             = "N/A"                                      
  INSTRUMENT_ID                  = "N/A"                                      
 END_OBJECT                      = DATA_SET_HOST                              
                                                                              
 OBJECT                          = DATA_SET_REFERENCE_INFORMATION             
  REFERENCE_KEY_ID               = "MAGNUSSONETAL1993"                        
 END_OBJECT                      = DATA_SET_REFERENCE_INFORMATION             
                                                                              
END_OBJECT                       = DATA_SET                                   
                                                                              
OBJECT                           = REFERENCE                                  
 REFERENCE_KEY_ID                = "MAGNUSSONETAL1993"                        
 REFERENCE_DESC                  = "Magnusson, P., C.-I. Lagerkvist, M.       
Dahlgren, A. Erikson, M. A. Barucci, I. Belskaya, and M. T. Capria 1993.      
The Uppsala Asteroid Data Base.  In Asteroids, Comets, Meteors 1993,          
A. Milani, M. Di Martino and A. Cellini, Eds. (Kluwer Academic Publishers,    
Dordrecht) pp. 471-476."                                                      
END_OBJECT                       = REFERENCE                                  
                                                                              
END