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 1996AcASn..37...68W
=1996ChA&A..20..364W 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 1973A&AS....9..313J) and Hertzsprung (1947AnLei..19a...1H 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 86 441 Reduction data of 441 sources (Table 2 of paper)
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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
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
5- 8 I4 --- Hertz Hertzsprung's catalog number
(1947AnLei..19a...1H 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
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Acknowledgements: Chen Li
(End) Patricia Bauer [CDS] 04-Jan-1999