TABLE 1                                                                         
*******                                                                         
                                                                                
DEFINITION OF THE CODED NUMBERING SYSTEM                                        
                                                                                
                                                                                
DURCHMUSTERUNG                                                                  
                                                                                
-0.XAABBBBB   CPD   SOUTH OF -52 (1875)                                         
                                                                                
-0.XAABBBBB   COD   NORTH OF -52 (1875)                                         
                                                                                
-0.XAABBBBB   BD    NORTH OF -23 (1855)                                         
                                                                                
+0.XAABBBBB   BD    NORTHERN HEMISPHERE                                         
                                                                                
              AA # DECLINATION ZONE                                             
              BBBBB # STAR NUMBER                                               
              X # 1, 2, ETC. FOR FIRST, SECOND ,ETC. COMPONANT                  
              OF VISUAL MULTIPLE STARS HAVING ONLY ONE DM NUMBER                
                                                                                
                                                                                
HD AND HDE CATALOGUES                                                           
                                                                                
+1.X0BBBBBB   HD AND HDE                                                        
                                                                                
              BBBBBB # HD- OR HDE NUMBER                                        
              X # 1, 2, ETC. FOR FIRST, SECOND, ETC. COMPONANT                  
              OF VISUAL MULTIPLE STARS HAVING ONLY ONE HD- OR HDE               
              NUMBER                                                            
                                                                                
                                                                                
OPEN AND GLOBULAR CLUSTERS                                                      
                                                                                
+2.XXXXBBBB   NGC CLUSTERS                                                      
                                                                                
+3.XXXXBBBB   IC  CLUSTERS                                                      
                                                                                
              XXXX # NGC OR IC NUMBER                                           
              BBBB # STAR NUMBER ACCORDING TO AUTHORS QUOTED IN THE             
              REFERENCE LIST IN TABLES 4 AND 5                                  
                                                                                
+4.AAXXBBBB   CLUSTERS WITHOUT NGC OR IC IDENTIFICATION                         
                                                                                
              AA # CODE FOR NAME, ACCORDING TO TABLE 2                          
              XX # CLUSTER NUMBER ACCORDING TO THE NAME                         
                                                                                
+5.AXXXBBBB   CLUSTERS WITHOUT NGC OR IC IDENTIFICATION                         
              FOR LISTS CONTAINING MORE THAN 100 CLUSTERS                       
                                                                                
              A # CODE FOR NAME, ACCORDING TO TABLE 2                           
              XXX # CLUSTER NUMBER ACCORDING TO THE NAME                        
                                                                                
              BBBB # STAR NUMBER ACCORDING TO AUTHOR QUOTED                     
              IN THE REFERENCES LIST IN TABLES 6                                
                                                                                
VARIOUS CATALOGUES AND LISTS OF STARS                                           
                                                                                
+6.0AABBBBB   CATALOGUES CONTAINING MORE THAN 10000 STARS                       
                                                                                
+6.1AAABBBB   CATALOGUES CONTAINING MORE THAN 1000 STARS                        
                                                                                
              AA, AAA # AUTHORS IDENTIFICATION ACCORDING                        
              TO THE REFERENCES LIST IN TABLE 7                                 
              BBBBB, BBBB # STAR NUMBER                                         
                                                                                
                                                                                
SELECTED AREAS                                                                  
                                                                                
+7.AXXXBBBB   CODE FOR STARS IN SELECTED AREAS                                  
                                                                                
              A # CATALOGUE IDENTIFICATION ACCORDING TO TABLE 8                 
              XXX # SELECTED AREA NUMBER                                        
              BBBB # STAR NUMBER                                                
                                                                                
                                                                                
MISCELLANOUS LISTS                                                              
                                                                                
+9.0AAABBBB   LISTS OF STARS IN ASSOCIATIONS                                    
                                                                                
              AAA # CODE FOR ASSOCIATIONS (TABLE 3)                             
              BBBB # STAR NUMBER ACCORDING TO THE AUTHOR                        
              IN THE REFERENCES LIST IN TABLE 9                                 
                                                                                
+9.5AYXXBBB   STANDARD REGIONS    (TABLE 9)                                     
                                                                                
              A # IDENTIFICATION (TABLE 9)                                      
              Y # 1-6 (A-F)                                                     
              XX # 01-09, REGION NUMBER                                         
              BBB # STAR NUMBER                                                 
                                                                                
                                                                                
TABLE 2                                                                         
*******                                                                         
                                                                                
NAME CODE FOR CLUSTERS IDENTIFICATION                                           
                                                                                
+4.AAXXBBBB                                                                     
                                                                                
              +4.09   BLANCO                                                    
              +4.21   HOGG                                                      
              +4.27   PISMIS                                                    
              +4.31   STOCK                                                     
              +4.35   TRUMPLER                                                  
                                                                                
+5.AXXXBBBB                                                                     
                                                                                
              +5.1    COLLINDER                                                 
              +5.2    MELOTTE                                                   
                                                                                
                                                                                
TABLE 3                                                                         
*******                                                                         
                                                                                
CODE OF SOME USUAL NUMBERING SYSTEMS                                            
                                                                                
              +6.001   LUYTEN LTT NUMBERS                                       
              +6.1001  GLIESE CATALOGUE OF NEARBY STARS                         
              +6.1003  YALE TRIGONOMETRICS PARALLAXES                           
              +7.4     POTSDAMER SPEKTRAL DURCHMUSTERUNG                        
              +9.0001  ORION NO BRUN                                            
              +9.0004  RING ORI   NO ISSERSTEDT                                 
              +9.0005  RING HYDRA NO ISSERSTEDT                                 
              +9.0008  CLUSTER IN LINE OF SIGHT OF THE LMC                      
              +9.50    HARVARD STANDARD REGIONS                                 
              +9.515   COUSINS AND STOY E REGIONS                               
                                                                                
                                                                                
TABLE 4                                                                         
*******                                                                         
                                                                                
REFERENCES FOR THE NUMEROTATION OF NGC CLUSTERS                                 
                                                                                
+2.2232       CLARIA,J.J. 1972, ASTRON. ASTROPHYS. 19, 303.                     
+2.2244       VAN SCHEWICK, H. 1958, VER. UNIV. STERN. BONN NO 51.              
+2.2264       WALKER, M.F. 1956, ASTROPHYS. J. SUPPL. 23,365.                   
              VASILEVSKIS, S. 1965, ASTRON. J. 70, 10 NO VAS.+300.              
+2.2287       COX, A.N. 1954, ASTROPHYS. J. 119, 188.                           
+2.2353       HOAG, A.A. AND AL. 1961, PUBL. US. NAV. OBS. 17, 347.             
+2.2362       JOHNSON, H.L. 1950, ASTRON. J. 112, 240.                          
+2.2422       VAN SCHEWICK, H. 1966, VEROEFFENTL. ASTRON. INST. UNIV.           
              BONN NO 74.                                                       
+2.2451       WILLIAMS, P.M. 1967, MONTHLY NOTES ASTRON. SOC. STH. AFRICA 26, 30
+2.2467       LODEN, L.O. 1966, ARKIV. ASTRON. 4, 65.                           
+2.2516       COX, A.N. 1955, ASTROPHYS. J. 121, 628.                           
+2.2546       LINDOFF, U. 1968, ARKIV. ASTRON. 5, 63.                           
+2.2547       FERNIE, J.D. 1959, MONTHLY NOTES ASTRON. SOC. STH. AFRICA 18, 57. 
+2.2632       KLEIN-WASSINK, W.J. 1927, PUBL. KAPTEYN ASTRON. LAB. 41.          
              VANDERLINDEN, H.L. 1933, ETUDE DE L/AMAS DE PRAESEPE.             
              J. DUCLOT, GEMBLOUX (BELGIUM). NO VL+1000                         
+2.3033       VOGT, N., MOFFAT, A.E.J. 1972, ASTRON. ASTROPHYS. SUPPL. 9, 97.   
+2.3114       JANKOWITZ, N.E.., MCCOSH, C.J. 1963, MONTHLY NOTES ASTRON. SOC.   
              STH. AFRICA 22, 18.                                               
+2.3293       FEAST, M.W. 1958, MONTHLY NOTICES ROY. ASTRON. SOC. 118, 618.     
+2.3532       KOELBLOED, D. 1959, BULL. ASTRON. INST. NETH. 14, 265.            
+2.3766       AHMED, F. 1962, PUBL. ROY. OBSERV. EDINBURG 3, 60.                
+2.4755       ARP, H., VAN SANT, C.T. 1958, ASTRON. J. 63, 341.                 
+2.5460       CLARIA, J.J. 1971, ASTRON. J. 76, 639.                            
+2.6124       KOELBLOED, D. 1959, BULL. ASTRON. INST. NETH. 14, 265.            
+2.6169       MOFFAT, A.F.J., VOGT, N. 1973, ASTRON. ASTROPHYS. SUPPL. 10, 135. 
+2.6193       MOFFAT, A.F.J., VOGT, N. 1973, ASTRON. ASTROPHYS. SUPPL. 10, 135. 
+2.6231       SEGGEWISS, W. 1968, VEROEFFENTL. ASTRON. ABH. INST. UNIV.         
              BONN NO 79.                                                       
+2.6383       THE P. S. 1965, CONTR. BOSCHA OBSERV. NO 32.                      
+2.6475       KOELBLOED, D. 1959, BULL. ASTRON. INST. NETH. 14, 265.            
+2.6530       WALKER, M.F. 1957, ASTROPHYS. J. 125, 636.                        
                                                                                
                                                                                
TABLE 5                                                                         
*******                                                                         
                                                                                
REFERENCES FOR THE NUMEROTATION OF IC CLUSTERS                                  
                                                                                
+3.2391       PERRY, C.L., HILL, G. 1969, ASTRON. J. 74, 89 (NO CDS).           
+3.2581       LLOYD, E.T. 1969, MONTHLY NOTICES ROY. ASTRON. SOC. 146, 101.     
+3.2602       BRAES, L.L.E. 1962, BULL. ASTRON. INST. NETH. 16, 297.            
+3.2944       THACKERAY, A.D. AND AL. 1965, MONTHLY NOTICES ROY. ASTRON.        
              SOC.131, 121.                                                     
+3.4725       JOHNSON, H.L. 1960, ASTROPHYS. J. 131, 620.                       
                                                                                
                                                                                
TABLE 6                                                                         
*******                                                                         
                                                                                
REFERENCES FOR THE NUMEROTATION OF CLUSTERS WITHOUT NGC OR IC NUMBER            
                                                                                
+4.0901       EPSTEIN, I. 1968, ASTRON. J. 73, 556.                             
+4.2122       MOFFAT, A.F.J., VOGT, N. 1973, ASTRON. ASTROPHYS. SUPPL. 10, 135. 
+4.2706       VOGT, N., MOFFAT, A.F.J. 1972, ASTRON. ASTROPHYS. SUPPL. 9, 97.   
+4.3116       LYNGA, G. IAU SYMP. NO 38, 270 (NO CDS).                          
+4.3510       LYNGA, G. 1959, ARKIV. ASTRON. 2, 379.                            
+5.1121       FEINSTEIN, A. 1967, ASTROPHYS. J. 149, 107.                       
+5.1140       WILLIAMS, P.M. 1967, MONTHLY NOTES ASTRON. SOC. STH. AFRICA 26,126
+5.2101       BRAES, L.L.E. 1962, MONTHLY NOTES ASTRON. SOC. STH. AFRICA 21, 16.
                                                                                
                                                                                
                                                                                
TABLE 7                                                                         
*******                                                                         
                                                                                
REFERENCES FOR CATALOGUES AND LISTS                                             
                                                                                
+6.0001       LUYTEN, W.J. 1957, A CATALOGUE OF 9867 STARS IN THE SOUTHERN      
              HEMISPHERE WITH PROPER MOTION EXCEEDING 0.2 ANNUALLY.             
              LUND PRESS, MINNEAPOLIS (MINESSOTA)                               
                                                                                
              LUYTEN, W.J. 1961, A CATALOGUE OF 7127 STARS IN THE NORTHERN      
              HEMISPHERE WITH PROPER MOTION EXCEEDING 0.2 ANNUALLY              
              LUND PRESS, MINNEAPOLIS (MINNESOTA)                               
                                                                                
              LUYTEN, W.J. 1962, FIRST SUPPLEMENT TO THE LTT CATALOGUES.        
              THE OBSERV. UNIV. MINNESOTA                                       
                                                                                
+6.1001       GLIESE, W. 1969, CATALOGUE OF NEARBY STARS                        
              VEROEFFENTL. HEIDELBERG NO 22.                                    
+6.1003       JENKINS, L.D. GENERAL CATALOGUE OF TRIGONOMETRIC PARALLAXES       
              1963, YALE UNIV. OBSERV.                                          
                                                                                
                                                                                
TABLE 8                                                                         
*******                                                                         
                                                                                
REFERENCE FOR THE SELECTED AREAS CATALOGUES                                     
                                                                                
+7.4XXXBBBB   BECKER, F., BRUCK, H. 1931-35, PUBL. ASTROPHYS. OBSERV.           
              POTSDAM, VOL. I7-28, SPECTRAL DURCHMUSTERUNG DER KAPTEYN#         
              SCHEN EICHFELDERN SUDHIMMELS.                                     
                                                                                
                                                                                
TABLE 9                                                                         
********                                                                        
                                                                                
REFERENCES FOR THE NUMEROTATION OF ASSOCIATIONS AND RINGS                       
                                                                                
+9.0001       BRUN, A. 1935, PUBL. OBSERV. LYON 1, FASC. 12, 1.                 
+9.0004       ISSERSTEDT, J. 1968, VEROEFFENTL. ASTRON. INST. UNIV.             
              BOCHUM 1, 121.                                                    
+9.0005       ISSERSTEDT, J. 1968, VEROEFFENTL. ASTRON. INST. UNIV.             
              BOCHUM 1, 121.                                                    
+9.0008       SANDULEAK, N., PHILIP A.G.D. 1968, ASTRON. J. 73, 566.            
                                                                                
REFERENCES FOR VARIOUS REGIONS                                                  
                                                                                
+9.50YXXBBB   HARVARD STANDARD REGIONS 1917, ANN. HARV. COLL. OBSERV. 71, 233.  
+9.515XXBBB   COUSINS, A.W.J., STOY, R.H. 1961, ROY. OBSERV. BULL. NO 49.