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J/A+AS/144/45 Hipparcos astrometry for 257 stars (Fabricius+, 2000)
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Hipparcos astrometry for 257 stars using Tycho-2 data
Fabricius C., Makarov V.V.
<Astron. Astrophys. Suppl. Ser. 144, 45 (2000)>
=2000A&AS..144...45F
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ADC_Keywords: Stars, double and multiple ; Parallaxes, trigonometric ;
Proper motions
Keywords: astrometry - catalogs - stars: fundamental parameters -
binaries: visual
Description:
We present improved Hipparcos astrometry for 257 Hipparcos stars,
resolved into 342 components. For 64 of the stars no astrometry
was obtained in the Hipparcos Catalogue, while for the remaining stars
additional components have been added by this solution or the
positions have been revised considerably. We have used the published
Hipparcos transit data for the new solutions, together with results
from the second reduction of the Tycho data for defining better
initial values.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 121 342 Revised Hipparcos astrometry
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP Hipparcos (Cat. <I/239>) number
8 A1 --- m_HIP [ABCDE] Component identification
10 I1 --- n_HIP [1,4] number of components in this system
12- 17 F6.3 mag Hpmag Hp magnitude
19- 30 F12.8 deg RAdeg Right Ascension, ICRS, Epoch 1991.25
32- 43 F12.8 deg DEdeg Declination, ICRS, Epoch 1991.25
45- 49 F5.1 mas plx ? Parallax
51- 56 F6.1 mas/a pmRA ? Proper motion in RA*cos(DE)
58- 63 F6.1 mas/a pmDE ? Proper motion in DE
65- 69 F5.3 mag e_Hpmag rms uncertainty on Hp magnitude
71- 74 F4.1 mas e_RAdeg rms uncertainty on right ascension
76- 79 F4.1 mas e_DEdeg rms uncertainty on declination
81- 84 F4.1 mas e_plx ? rms uncertainty on parallax
86- 89 F4.1 mas/a e_pmRA ? rms uncertainty on pmRA
91- 94 F4.1 mas/a e_pmDE ? rms uncertainty on pmDE
96- 98 I3 --- Nobs ? Number of observations available
100-101 I2 % Rej ? Percentage of observations rejected
103 A1 --- ref [ABC]? reference component for PA, Sep
105-110 F6.2 deg PA ? Position angle
112-117 F6.3 arcsec Sep ? Separation
119 A1 --- flag1 [lnx] See Note (1)
121 A1 --- flag2 [RU] See Note (2)
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Note (1):
l: results for this component is in strong disagreement with Hipparcos;
n: this component has no astrometry in the Hipparcos Catalogue;
x: this component is not in the Hipparcos Catalogue.
Note (2):
R: there is a remark in the printed paper, Section 5;
U: the solution is slightly uncertain.
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Acknowledgements: Claus Fabricius <cf@astro.ku.dk>
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(End) Patricia Bauer [CDS] 04-May-2000