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I/258             Pleiades positions and proper motions      (Wang+, 1996)

High precision positions and proper motions of 441 stars in the Pleiades astrometric standard region Wang J., Chen L., Zhao J., Jiang P. <Acta Astron. Sinica, 37, 68 (1996)> =1996AcASn..37...68W =1996ChA&A..20..364W
ADC_Keywords: Clusters, open ; Positional data ; Proper motions Keywords: Pleiades - astrometric standard region - positions - proper motions Description: Based on a preliminary reference catalogue, combined with the catalogues PPM, ACRS and those in Eichhorn et al (1970, Cat. I/90), Jones (1973A&AS....9..313J) and Hertzsprung (1947AnLei..19a...1H), 33 exposures on 11 plates taken with the Zo-Se 40cm refractor (f=6895mm) in 86 years are reduced with the central overlapping technique, and high-precision positions and proper motions of 441 stars in the Pleiades astrometric standard region are obtained. The standard errors of star positions are less than ±0.05arcsec, and the standard errors of proper motions for 90% stars in our reduction are less than ±0.001arcsec/yr. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 86 441 Reduction data of 441 sources (Table 2 of paper)
See also: I/90 : Positions of 502 Stars in Pleiades Region (Eichhorn+ 1970) I/163 : US Naval Observatory Pleiades Catalog (Van Flandern 1969) Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 5- 8 I4 --- Hertz Hertzsprung's catalog number (1947AnLei..19a...1H) 10- 11 I2 h RAh Right ascension (Eq=J2000.0, Ep=J2000) 13- 14 I2 min RAm Right ascension (Eq=J2000.0, Ep=J2000) 16- 22 F7.4 s RAs Right ascension (Eq=J2000.0, Ep=J2000) 24- 25 I2 0.1ms e_RAs rms uncertainty on right ascension 27- 35 F9.6 s/yr pmRA Proper motion in right ascension 37- 39 I3 ns/yr e_pmRA rms uncertainty on pmRA 41- 47 F7.2 yr EpRA Central epoch for the right ascension 49 A1 --- DE- Declination sign (Eq=J2000.0, Ep=J2000) 50- 51 I2 deg DEd Declination (Eq=J2000.0, Ep=J2000) 53- 54 I2 arcmin DEm Declination (Eq=J2000.0, Ep=J2000) 56- 61 F6.3 arcsec DEs Declination (Eq=J2000.0, Ep=J2000) 63- 65 I3 mas e_DEs rms uncertainty on declination 67- 74 F8.5 arcsec/yr pmDE Proper motion in declination 76- 78 I3 10-2mas/yr e_pmDE rms uncertainty on pmDE 80- 86 F7.2 yr EpDE Central epoch for the declination
Acknowledgements: Chen Li
(End) Patricia Bauer [CDS] 04-Jan-1999
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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