File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file ident_o.dat 88 1107 Preferred star identifications ident_b.dat 84 1086 Star identifications from Baily ident_k.dat 84 1124 Star identifications from Knobel ident_a.dat 88 1061 Identifications from VizieR J/A+A/544/A31 dists_ko.dat 34 1107 Differences with modern positions begpto_oo.dat 25 1021 Cross-mapping with Ptolemy's catalog begref_o.dat 20 1099 Cross-mapping with the reference catalog -------------------------------------------------------------------------------- Byte-by-byte Description of file: ident_o.dat ident_b.dat ident_k.dat ident_a.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- UNo [1/1018]? Unique star number (1) 6- 8 A3 --- UCon ?Ulugh Beg constellation (1) 9 A1 --- UInf [~]? ~ if 'informis' (1) 10- 11 I2 --- UNum ?Ulugh Beg number in constellation (1) 12 A1 --- NoId [*+?]? Identification issue (2) 13- 15 A3 --- BCon ?Bayer constellation 17- 19 A3 --- BLet ?Bayer letter 21 A1 --- BInd ?Bayer index 23- 25 A3 --- FCon ?Flamsteed constellation 27- 29 I3 --- FNum [1-141]? Flamsteed number 31- 34 I4 --- HR [1-9110]? Bright Star catalog number 36- 41 I6 --- HD [1-359083]? Henry Draper catalog number 42 A1 --- HD_FL [*]? Next HD number applies 43- 48 I6 --- HIP [1-120416]? Hipparcos catalog number 50- 55 I6 --- SAO [1-258997]? SAO catalog number 56 A1 --- SAO_FL [*]? Next SAO number applies 57- 60 A4 --- Com ?Component letter(s) (3) 62- 66 F5.2 --- Mag ?Magnitude (4) 67 A1 --- Shr [*]? Shared magnitude 68- 92 A25 --- Name ?Object name(s) -------------------------------------------------------------------------------- Note (1): these fields are empty on lines containing additional matches for the current star. Note (2): a '*' here indicates that this catalog entry has no identification; a '?' indicates a possible but less secure identification; a '+' indicates that the identification has been corrected from an obvious error in the catalog or inferred from catalog notes or non-standard designations. Note (3): component letter(s) from the Hipparcos catalog (or sometimes the SAO or Bright Star catalog). Note (4): magnitude from the Hipparcos catalog or the SAO catalog. -------------------------------------------------------------------------------- Byte-by-byte Description of file: dists_ko.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- UNo [1/1018]? Unique star number 6- 8 A3 --- UCon ?Ulugh Beg constellation 9 A1 --- UInf [~]? ~ if 'informis' 10- 11 I2 --- UNum ?Ulugh Beg number in constellation 13- 19 F7.2 arcmin dLO ?Difference in longitude.cos(LA) (1) 21- 27 F7.2 arcmin dLA ?Difference in latitude (1) 29- 34 F6.2 arcmin dist ?Distance between match and Ulugh Beg (1) -------------------------------------------------------------------------------- Note (1): difference (HIP - Ulugh Beg), or (SAO - Ulugh Beg) if there is no HIP match, based on the positions in ulughbeg_k.dat and identifications in ident_o.dat. -------------------------------------------------------------------------------- Byte-by-byte Description of file: begpto_oo.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- UNo [1/1018]? Unique Ulugh Beg star number 6- 8 A3 --- UCon ?Ulugh Beg constellation 9 A1 --- UInf [~]? ~ if 'informis' 10- 11 I2 --- UNum ?Ulugh Beg number in constellation 13 A1 --- Status [=x*] status (G2) 15- 18 I4 --- PNo [1/1028]? Unique Ptolemy star number 20- 22 A3 --- PCon ?Ptolemy constellation 23 A1 --- PInf [~]? ~ if 'informis' 24- 25 I2 --- PNum ?Ptolemy number in constellation -------------------------------------------------------------------------------- Byte-by-byte Description of file: begref_o.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- UNo [1/1018]? Unique Ulugh Beg star number 6- 8 A3 --- UCon ?Ulugh Beg constellation 9 A1 --- UInf [~]? ~ if 'informis' 10- 11 I2 --- UNum ?Ulugh Beg number in constellation 13 A1 --- Status [=>x*] status (G2) 15- 20 I6 --- RefNo ?Number in the reference catalog -------------------------------------------------------------------------------- Global notes: Note (G1): the fields UNo UCon UInf UNum are blank on continuation lines for the current record. Note (G2): status of this Ulugh Beg object with respect to the other catalog, according to the identifications retained in the file ident_o.dat for Ulugh Beg's catalog and either ident_o.dat or ident.dat for the other catalog: = indicates that the Ulugh Beg and other catalog entries are identified as the same object or collection of objects, > indicates that the Ulugh Beg catalog entry includes the other catalog's entry, and more (for instance if two components of a double star are distinguished in the other catalog but lumped into one entry in Ulugh Beg's catalog), x indicates that the Ulugh Beg catalog entry has an identification, but no match in the other catalog, * indicates that the Ulugh Beg catalog entry is unidentified. -------------------------------------------------------------------------------- History: * 2022-03-10: first release. ================================================================================