File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file ident.dat 85 3043 Star identifications dists.dat 35 3043 Differences with modern positions flmpto_o.dat 37 1567 Cross-mapping with Ptolemy's catalog flmtyc_o.dat 47 1575 Cross-mapping with Tycho's catalog flmhev_o.dat 38 1599 Cross-mapping with Hevelius's catalog flmref.dat 38 1599 Cross-mapping with the reference catalog -------------------------------------------------------------------------------- Byte-by-byte Description of file: ident.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- FNo [1/2936]? Unique star number (1) 6- 8 A3 --- FCon ? Flamsteed constellation abbreviation (1) 10- 12 I3 --- FNum [1/141]? Flamsteed number (1) 13 A1 --- NoId [*] Asterisk if unidentified entry 14- 16 A3 --- BCon ? Bayer constellation 18- 20 A3 --- BLet ? Bayer letter 22 A1 --- BInd ? Bayer index 24- 26 A3 --- FCon_ ? Flamsteed constellation 28- 30 I3 --- FNum_ [1-141]? Flamsteed number 32- 35 I4 --- HR [1-9110]? Bright Star catalog number 36 A1 --- addHR [*] Next HR number included 37- 42 I6 --- HD [1-359083]? Henry Draper catalog number 43 A1 --- addHD [*] Next HD number included 44- 49 I6 --- HIP [1-120416]? Hipparcos catalog number 51- 56 I6 --- SAO [1-258997]? SAO catalog number 57 A1 --- addSAO [*] Next SAO number included 58- 61 A4 --- Com ? Component letter(s) 63- 67 F5.2 --- Mag ? Magnitude of match 68 A1 --- Shr [*] Asterisk if shared magnitude 69-108 A40 --- Name ? Star name or deep sky object designation -------------------------------------------------------------------------------- Note (1): these fields are empty on lines containing additional matches for the current star. -------------------------------------------------------------------------------- Byte-by-byte Description of file: dists.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- FNo [1/2936]? Unique star number (1) 6- 8 A3 --- FCon ? Flamsteed constellation abbreviation (1) 10- 12 I3 --- FNum [1/141]? Flamsteed number (1) 13 A1 --- NoId [*] Asterisk if unidentified entry 14- 20 F7.2 arcmin dLO ? Difference in longitude.cos(LA) (2) 22- 28 F7.2 arcmin dLA ? Difference in latitude (2) 30- 35 F6.2 arcmin dist ? Distance between match and Flamsteed (2) -------------------------------------------------------------------------------- Note (1): these fields are empty on lines containing additional matches for the current star. Note (2): difference (HIP - Flamsteed), or (SAO - Flamsteed) if there is no HIP match, based on the identifications in ident.dat and positions in flamsteed_f.dat modified according to Baily's corrections in flamsteed_pos.dat. -------------------------------------------------------------------------------- Byte-by-byte Description of file: flmpto_o.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- FNo [1/2936]? Unique star number (G1) 6- 8 A3 --- FCon ? Flamsteed constellation abbreviation (G1) 10- 12 I3 --- FNum [1/141]? Flamsteed number (G1) 14 A1 --- Status [=x*] status (G2) 16- 21 I6 --- RefNo ? Number in the reference catalog -------------------------------------------------------------------------------- Global notes: Note (G1): these fields are blank on continuation lines for the current record. Note (G2): status of this Flamsteed object with respect to the other catalog, according to the identifications retained in ident_o.dat for Flamsteed's catalog and either ident_o.dat or ident.dat for the other catalog: = indicates that the Flamsteed and other catalog entries are identified as the same object or collection of objects, < indicates that the Flamsteed catalog entry is included as a component in the other catalog's entry (this happens with Ptolemy, Tycho, Hevelius) > indicates that the Flamsteed catalog entry includes the other catalog's entry, and more (this happens with the reference catalog), x indicates that the Flamsteed catalog entry has an identification, but no match in the other catalog (no such case occurs with the reference catalog but many do for Ptolemy, Tycho, Hevelius since Flamsteed's catalog is larger; they have not been included here to avoid cluttering the files), * indicates that the Flamsteed catalog entry is unidentified. -------------------------------------------------------------------------------- History: * 2026-06-30: new revised edition. ================================================================================