J/AJ/105/1822 Open clusters near eta Car (Cudworth+ 1993)
Proper motions, membership, and photometry of open clusters near eta Carinae
Cudworth K.M., Martin S.C., Degioia-Eastwood K.
<Astron. J. 105, 1822 (1993)>
=1993AJ....105.1822C 1993AJ....105.1822C
ADC_Keywords: Clusters, open; Positional data; Proper motions; Photometry
Abstract:
Proper motions and photographic photometry have been derived for nearly
600 stars with 7.5 < V < 15.5 in the region of the very young open
clusters Tr 14, Tr 16, and Cr 232 based on 26 plates dating from 1893
to 1990. Cluster membership probabilities have been derived from the
proper motions and color-magnitude diagrams of probable members of each
cluster are presented. In contrast to a few of the previous studies we
find all three clusters to lie at the same distance.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 66 577 Positions, proper motions, photometry, and
membership probabilities
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Star identification number (2)
9- 16 F8.1 arcsec X X coordinate (1)
17- 24 F8.1 arcsec Y Y coordinate (1)
26- 32 I7 10uas/yr pmX Relative proper motion in X
33- 36 I4 10uas/yr e_pmX rms uncertainty on pmX
37- 43 I7 10uas/yr pmY Relative proper motion on Y
44- 47 I4 10uas/yr e_pmY rms uncertainty on pmY
50- 55 F6.2 mag Vmag V magnitude
56- 61 F6.2 mag B-V B-V color
62- 66 I5 % Member Calculated membership probability
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Note (1): X, Y positions are given in a coordinate system that is aligned
with right ascension and declination of equator and equinox 1950, but
positions are epoch 1975. The zero point of these offsets is star Y1
(Vmag=12.82) which lies at 10:42:32.87 -59:20:29.0 (equator and
equinox 1950)
Note (2): Letters correspond to:
FA = Feinstein et al. (1973A&AS...12..331F 1973A&AS...12..331F)
FB = Feinstein (1982AJ.....87.1012F 1982AJ.....87.1012F)
HD = Henry Draper Catalogue (Cat. III/135)
Y = This study
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References:
Feinstein, A. 1982, AJ, 87, 1012 (1982AJ.....87.1012F 1982AJ.....87.1012F)
Feinstein, A., Marraco, H. G., & Muzzio, J. C. 1973, A&AS, 12, 331
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Origin: AAS CD-ROM series, Volume 1, 1993
* 20-Jul-2001: table3.dat, line 1, corrected HD92350 into HD93250.
(End) Patricia Bauer [CDS] 06-Jul-1994