DEFINITION OF THE CODED NUMBERING SYSTEM

TABLE 1
*******


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 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 5 AND 6
              -N- IN THE 12TH COLUMN MEANS THAT THE STAR
              IS DECLARED NON-MEMBER

 5.AXXXBBBB   CLUSTERS WITHOUT NGC OR IC IDENTIFICATION
              FOR LISTS CONTAINING MORE THAN 100 CLUSTERS

              A # CODE FOR NAME, ACCORDING TO TABLE 2B
              XXX # CLUSTER NUMBER ACCORDING TO THE NAME

              BBBB # STAR NUMBER ACCORDING TO AUTHOR QUOTED
              IN THE REFERENCES LIST IN TABLES 7A AND 7B


VARIOUS CATALOGUES AND LISTS OF STARS

 6.0AABBBBB   CATALOGUES CONTAINING MORE THAN 10000 STARS

 6.1AAABBBB   CATALOGUES CONTAINING MORE THAN 1000 STARS


MISCELLANOUS LISTS

 9.0AAABBBB   LISTS OF STARS IN ASSOCIATIONS

              AAA # CODE FOR ASSOCIATIONS (TABLE 4)
              BBBB # STAR NUMBER ACCORDING TO THE AUTHOR
              IN THE REFERENCES LIST IN TABLE 11


TABLE 2B
********

 5.AXXXBBBB

                5.1     COLLINDER
                5.2     MELOTTE


TABLE 4
*******

CODE OF SOME USUAL NUMBERING SYSTEMS

 2.XXXXBBBB
                2.2632  PRAESEPE

 5.2XXXBBBB
                5.2020  ALPHA PERSEI CLUSTER
                5.2022  PLEIADES
                5.2025  HYADES
                5.2111  COMA BERENICES

 6.0AABBBBB
                6.001  LUYTEN LTT NUMBERS

 6.1AAABBBB
                6.1001  GLIESE CATALOGUE OF NEARBY STARS

 9.0AAABBBB
                9.0001  ORION  NO BRUN
                9.0002  III CEPHEI  NO BLAAUW
                9.0003  VI CYGNI  NO JOHNSON AND MORGAN
                9.0004  RING ORI   NO ISSERSTEDT


TABLE 5
*******

REFERENCES FOR THE NUMEROTATION OF NGC CLUSTERS

 2.0457BBBB   BODEN E. 1946, UPPSALA ASTR.OBS.ANN. 2,1
 2.0752BBBB   HEINEMANN K. 1926, ASTR.NACH. 227,193
 2.2264BBBB   WALKER M.F. 1956, AP.J. SUPPL. 23,365
              VASILEVSKIS S. 1965, A.J. 70,10 NO VAS.+300
 2.2281BBBB   VASILEVSKIS S., BALZ A.G.A. 1959, A.J. 64,170
 2.2632BBBB   KLEIN-WASSINK W.J. 1927, PUBL.KAPTEYN ASTR.LAB. 41
              VANDERLINDEN H.L. 1933, ETUDE DE L AMAS DE PRAESEPE.
              J. DUCLOT, GEMBLOUX (BELGIQUE). NO VL+1000
 2.2682BBBB   FAGERHOLM E. 1906, UPPSALA DISSERTATION
              MURRAY C.A., AND AL. 1965, R.O.B. NO 91, NO+400
              FOR EGGEN-SANDAGE STARS IN TABLE 2
 2.4755BBBB   ARP H., VAN SANT C.T. 1958, A.J. 63,341
 2.5272BBBB   PUB.US.NAV.OBS 20,PART 5
 2.6231BBBB   SEGGEWISS W. 1968, VER.ASTR.ABH.INST.UNIV.BONN NO 79
 2.6633BBBB   KOPFF E. 1943, ASTR.NACH. 274,69
 2.6871BBBB   HOAG A.A., AND AL. 1961, PUBL.US.NAV.OBS. 17,347
 2.6882BBBB   HOAG A.A., AND AL. 1961, PUBL.US.NAV.OBS. 17,347
 2.6910BBBB   TIFFT W.G. 1958, A.J. 63,127
 2.7654BBBB   LUNDBY A. 1946, UPPSALA ASTR.OBS.ANN. 1 NO 10
 2.7686BBBB   HOAG A.A., AND AL. 1961, PUBL.US.NAV.OBS. 17,347


TABLE 6
*******

REFERENCES FOR THE NUMEROTATION OF IC CLUSTERS

 3.0348BBBB   GINGRICH C.H. 1922, AP.J. 56,139
 3.2581BBBB   EVANS L.T. 1969, MNRAS 146,101
 3.4756BBBB   KOPFF E. 1943, ASTR. NACH. 274,69


TABLE 7B
********

 5.1121BBBB   FEINSTEIN A. 1967, AP.J. 149,107

 5.2020BBBB   HECKMANN O., AND AL. 1956, MITT.HAMB.ST.BERG. NO 101
 5.2022BBBB   HERTZSPRUNG E. 1947, ANN.STERREW.LEIDEN 19,3
 5.2025BBBB   VAN BUEREN H.G. 1952, BULL.ASTR.INST.NETHERL.11,385
              VAN ALTENA W.F. 1966, A.J. 71,482  NO VAN ALT.+1000
 5.2111BBBB   TRUMPLER R.J. 1938, LICK OBS.BULL. 18,167


TABLE 8
*******

 6.001BBBBB   LUYTEN W.J. 1957, A CATALOGUE OF  9867 STARS IN THE
              SOUTHERN HEMISPHERE WITH PROPER MOTION EXCEEDING 0.2
              ANNUALLY. LUND PRESS, MINNEAPOLIS (MINNESOTA)
              LUYTEN W.J. 1961, A CATALOGUE OF 7127 STARS IN THE
              NORTHERN HEMISPHERE WITH PROPER MOTION EXCEEDING 0.2
              ANNUALLY. THE LUND PRESS, MINNEAPOLIS (MINNESOTA)
              LUYTEN W.J. 1962, FIRST SUPPLEMENT TO THE LTT
              CATALOGUES. THE OBS,UNIV. MINNESOTA

 6.1001BBBB   GLIESE W. 1969, CATALOGUE OF NEARBY STARS
              VEROEFF. HEIDELBERG NO 22


TABLE 11
********

REFERENCES FOR THE NUMEROTATION OF ASSOCIATIONS AND RINGS

 9.0001BBBB   BRUN A. 1935, PUBL.OBS.LYON 1, FASC 12,1
 9.0002BBBB   BLAAUW A. AND AL. 1959, AP.J. 130,69
 9.0003BBBB   JOHNSON H.L., MORGAN W.W. 1954, AP.J. 119,344
 9.0004BBBB   ISSERSTEDT J. 1968, VER.ASTR.INST.UNIV.BOCHUM 1,121