File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file ptolemy_t.dat 31 1028 Ptolemy's catalog from Toomer ptolemy_p.dat 31 1031 Ptolemy's catalog from Peters & Knobel ptolemy_m.dat 31 1028 Ptolemy's catalog from Manitius ptolemy_b.dat 31 1028 Ptolemy's catalog from Baily ptolemy_h.dat 31 1037 Ptolemy's catalog from Halma ptolemy_z.dat 31 1028 Ptolemy's catalog from Flamsteed cross_t.dat 47 1049 Identifications according to Toomer cross_p.dat 47 1070 Identifications according to P & K cross_m.dat 47 1029 Identifications according to Manitius cross_b.dat 47 1028 Identifications according to Baily cross_h.dat 47 1038 Identifications according to Halma cross_z.dat 47 1028 Identifications according to Flamsteed cross_f.dat 47 1072 Ids extracted from Flamsteed's catalog notes_t.dat Notes on Toomer's version notes_p.dat Notes on Peters & Knobel's version notes_m.dat Notes on Manitius's version notes_b.dat Notes on Baily's version notes_h.dat Notes on Halma's version notes_z.dat Notes on Flamsteed's version -------------------------------------------------------------------------------- Byte-by-byte Description of files: ptolemy_t.dat ptolemy_p.dat ptolemy_m.dat ptolemy_b.dat ptolemy_h.dat ptolemy_z.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- PNo [1/1028]? Unique star number (1) 6- 8 A3 --- PCon ?Ptolemy constellation 9 A1 --- PInf [~]? ~ if 'informis' 10- 11 I2 --- PNum ?Ptolemy number in constellation 12 A1 --- w_Pto [*]? Warning about this entry (2) 13- 14 I2 --- LO.z [0/11]? Longitude A.D. 137 Zodiac sign (3) 16- 17 I2 deg LO.d ?Longitude (degrees) within zodiac sign 18 A1 --- w_LO [*]? Warning about longitude (4) 19- 20 I2 arcmin LO.m ?Longitude (minutes) 22 A1 --- LA.- [+-]? Latitude sign 23- 24 I2 deg LA.d ?Latitude (degrees) 25 A1 --- w_LA [*]? Warning about latitude (5) 26- 27 I2 arcmin LA.m ?Latitude (minutes) 28 A1 --- w_Mag [*]? Warning about magnitude (6) 29- 31 A3 --- Mag Magnitude or magnitude range (7) -------------------------------------------------------------------------------- Note (1): This is the sequential star number from Baily's edition of Ptolemy's catalogue. This number and the Ptolemy designation (PCon-PInf-PNum) are absent on continuation records, which contain additional or alternative field values for the star. Note (2): In Manitius's version, * here indicates that there is a note about this star on pp. 401-406. Note (3): The degrees part of the ecliptic longitude is expressed by two components: the zodiac sign, an integer from 0 (Aries) to 11 (Pisces), and the offset in degrees (in the range [0, 30[) within the zodiac sign. The degrees part of the ecliptic longitude is therefore 30 * Lo.z + Lo.d. All versions use the traditional symbols for the zodiac signs, rather than integers. Note (4): In Toomer's version, * here means that there is doubt about the longitude of this star. In Peters & Knobel's and Baily's versions, * here means that their mutual longitudes differ. In Flamsteed's version, * here means that the longitude is marked :: in the catalog. Note (5): In Toomer's version, * here means that there is doubt about the latitude of this star. In Peters & Knobel's and Baily's version, * here means that their mutual latitudes differ. In Flamsteed's version, * here means that the latitude is marked :: in the catalog. Note (6): In Toomer's version, * here indicates that there is doubt about the magnitude of this star. Note (7): The magnitude field consists of a single integer or, in some of the versions, an integer range such as 4-3. It may also contain the word 'obs' (obscure) or 'neb' (nebulous). -------------------------------------------------------------------------------- Byte-by-byte Description of files: cross_t.dat cross_p.dat cross_m.dat cross_b.dat cross_h.dat cross_z.dat cross_f.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- PNo [1/1028]? Unique star number (1) 6- 8 A3 --- PCon ?Ptolemy constellation 9 A1 --- PInf [~]? ~ if 'informis' 10- 11 I2 --- PNum ?Ptolemy number in constellation 12 A1 --- NoId [*]? Identification issue (2) 13- 15 A3 --- BCon ?Bayer constellation 16 A1 --- w_Bay [*+]? Warning about Bayer designation (3) 17- 19 A3 --- BLet ?Bayer letter in constellation 21 I1 --- BInd ?Bayer index 23- 25 A3 --- FCon ?Flamsteed constellation 26 A1 --- w_Flm [*+]? Warning about Flamsteed designation (3) 27- 29 I3 --- FNum ?Flamsteed number in constellation 31- 32 I2 hrs ZRa [0/23]? Piazzi right ascension wedge 34- 36 I3 --- ZNo ?Piazzi number within right ascension wedge 38- 41 I4 --- LNum [0/1942]? Lacaille number (4) 43- 46 I4 --- HR [0/9110]? HR (Bright Star) or Ambronn number (5) 47 A1 --- w_HR [*+]? Warning about the HR or Ambronn number (6) -------------------------------------------------------------------------------- Note (1): This is the sequential star number from Baily's edition of Ptolemy's catalogue. This number and the Ptolemy designation (PCon-PInf-PNum) are absent on continuation records, which contain additional or alternative field values for the star. Note (2): A '*' here indicates that this catalog entry has no identification. Note (3): In Toomer's version, a '*' here indicates that there is doubt about the association of this star with the Bayer designation. In Halma's version, a '*' or a '+' indicates that there is some issue with this identification, documented in notes_h.dat. The '+' implies that some interpretation went into this identification (such as choosing a constellation other than the default). Note (4): The number in Lacaille's catalog of 1942 stars 'Stellarium Australium Catalogus' at the end of 'Coelum Australe Stelliferum', Paris, 1763. Note (5): If present, this is the HR number in all versions except Manitius's and Halma's. In Manitius's version, this is the Ambronn number. Note (6): In Toomer's version, a '*' here means that there is doubt about this HR identifier. In Manitius's version, it means that the Ambronn number is marked by a '*' in the catalog, which indicates the presence of a footnote for this star. In Halma's version, a '+' here means that a number that doesn't appear to be a Flamsteed number has been interpreted as a CA number or, in the last resort, relegated to the HR column. -------------------------------------------------------------------------------- History: * 2020-08-01: new revised edition. ================================================================================