File Summary:
--------------------------------------------------------------------------------
 FileName           Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe                 80        .   This file
piazzi.dat            142     7646   Piazzi star catalog
notes.dat                            Issues in source catalog
--------------------------------------------------------------------------------

Byte-by-byte Description of file: piazzi.dat
--------------------------------------------------------------------------------
   Bytes Format  Units   Label   Explanations
--------------------------------------------------------------------------------
   1-  2  I2    ---     ZHr     [0/23] Hour part of the star identifier
       3  A1    ---     Dot     [.] Dot delimiter
   4-  6  I3    ---     ZNum    Star number within the hour
       7  A1    ---     Note    [*]? Flag
   8- 10  A3    ---     Con     ?Constellation abbreviation
  12- 14  A3    ---     BLet    ?Bayer letter within constellation
      16  A1    ---     BInd    ?Bayer index
  18- 20  I3    ---     FNum    ?Flamsteed number within constellation
  22- 23  I2    ---     HNum    ?Hevelius number within constellation
  25- 28  I4    ---     LNum    ?Lacaille CA number
  30- 32  I3    ---     ZoNum   ?Zodiacal star number
  34- 36  I3    ---     MNum    ?Mayer number
  38- 39  I2    ---     Mag     [1/12]?Magnitude or lower magnitude value
      40  A1    ---     Delim   [~]? Delimiter for magnitude range
  41- 42  A2    ---     Mag_    ?Upper magnitude value (1)
  44- 45  I2    h       RAh     Right Ascension 1800 to the minute (hours)
  47- 48  I2    min     RAmin   Right Ascension 1800 to the minute (minutes)
  50- 52  I3    deg     RAd     Right Ascension 1800 (degrees)
  54- 55  I2    arcmin  RAm     Right Ascension 1800 (minutes)
  57- 60  F4.1  arcsec  RAs     Right Ascension 1800 (seconds)
  62- 68  F7.2  arcsec  RApre   Yearly precession in RA
  70- 75  F6.3  arcsec  pmRA    ?Yearly proper motion in RA
  77- 82  A6    ---     pmRA_t  ?Source of pmRA
  84- 86  I3    ---     RA_ob   ?Number of observations of RA
  88- 89  I2    deg     DEd     Degrees DE, 1800
  91- 92  I2    arcmin  DEm     Minutes DE, 1800
  94- 97  F4.1  arcmin  DEs     Seconds DE, 1800
      99  A1    ---     DEsgn   [+-] Sign DE
 101-106  F6.2  arcsec  DEpre   Yearly precession in DE
 108-113  F6.3  arcsec  pmDE    ?Yearly proper motion in DE
 115-120  A6    ---     pmDE_t  ?Source of pmDE
 122-124  I3    ---     DE_ob   Number of observations of DE
     125  A1    ---     Upper   [^]? Flag for uppercase name (2)
 126-142  A17   ---     name    ?Star name or other qualifier
--------------------------------------------------------------------------------

Note (1): this field is left-justified so that a magnitude range looks better
    to human eyes, as in 4~5 or 9~10. It would qualify for type I2 if it were
    right-justified.

Note (2): a '^' here indicates that the star name or some part of the star
    designations is written in capital letters, the meaning of which is
    explained in the catalog's introduction.

--------------------------------------------------------------------------------

History:

  * 2021-05-01: new revised edition.

================================================================================