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I/68A   Positions and Proper Motions in alpha Per cluster  (Fresneau, 1980)
Positions and proper motions OF 1981 stars in the vicinity of α Per
     Fresneau A.
    <Bull. Inform. CDS 18, 81 (1980)>
    =1980BICDS..18...81F
ADC_Keywords: Positional data ; Proper motions ; Regional catalog


Description:
    A list of positions and proper motions is given for 2027 stars of
    magnitude 7.5 to 12.5 within a radius of 3.5 deg. of alpha Persei.
    The values are poor for stars fainter than 11.
    The present list supersedes the microfiche edition (catalogue I/68/)
    which was described in the Bull. Inform. CDS 18, 81 (1980).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
main              79     1981   alpha Per - Catalogue


Byte-by-byte Description of file: main

   Bytes Format Units    Label    Explanations

   2-  5  I4    ---      Mel20   *[1/1379]? Heckmann's number
   8- 14  A7    ---      BD      *BD (cat. <I/122>) or CSI
                                 (Catalogue of Stellar Identifications)
  16- 17  A2    ---      SpType   Spectral type (from Heckmann)
  19- 21  I3    0.1mag   Pmag     Photographic Magnitude, in 0.1 magnitude
  23- 29  F7.2  yr       Epoch    Epoch of equatorial coordinates
  30- 31  I2    h        RAh      [3]  RA 1950 at Epoch (hours, always 3)
  32- 33  I2    min      RAm      RA 1950 at Epoch (minutes)
  34- 39  F6.3  s        RAs      RA 1950 at Epoch (seconds)
  40- 44  F5.3  s        e_RAs   *?=0.0 Mean error on RA (seconds)
  45- 50  F6.2  s/ha     pmRA     Proper motion mu_alpha in time seconds/century
  51- 54  F4.2  s/ha     e_pmRA  *?=0.0 Mean error on pmRA
      55  A1    ---      DE-      [+] Declination 1950 at Epoch (sign)
  56- 57  I2    deg      DEd      Declination 1950 at Epoch (Degrees)
  58- 59  I2    arcmin   DEm      Declination 1950 at Epoch (Arc minutes)
  60- 64  F5.2  arcsec   DEs      Declination 1950 at Epoch (Arc seconds)
  65- 68  F4.2  arcsec   e_DEs   *?=0.0 Mean error on Dec (arc seconds)
  70- 75  F6.2 arcsec/ha pmDE     Proper motion mu_delta in arcsec/century
  76- 79  F4.2 arcsec/ha e_pmDE  *?=0.0 Mean error on pmDE

Note on Mel20: number as published in Astron. Nachr. 283, 109
     (Mitt. Hamburger Sternw. 1956MiHam..10...37H)
     if the star belongs to Heckmann's list
Note on BD: this identification is not in BD when a dash (-) follows
     the degree zone number.
Note on e_RAs, e_DEs, e_pmRA, e_pmDE:
     a zero mean error means that only one observation is available,
     and hence the mean error is undefined.

(End)           Alain Fresneau, Francois Ochsenbein [Strasbg Obs.]   26-Mar-1993