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HD 209068


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Population studies. I - The Bidelman-MacConnell 'weak-metal' stars
BRVI and DDO photometry are presented for 309 Bidelman-MacConnell'weak-metal' stars. Radial velocities are calculated for most of thestars having Fe/H abundances of no more than -0.8. The photometricobservations were carried out using the 0.6-meter and 1.0-metertelescopes of the Siding Spring Observatory. Photometric taxonomy wasused to classify the stars as dwarfs, giants, red-horizontal branchstars, and ultraviolet-bright stars, respectively. It is found that 35percent of the stars are giants; 50 percent are dwarfs; and 5 percentbelong to the red-horizontal branch group. The role of selection effectsin investigations of the formation of the Galaxy is discussed on thebasis of the photometric observations and the observational constraintsproposed by Eggen et al. (1962).

Photometry of Metal Weak Stars
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Observation and Astrometry data

Constellation:みずがめ座
Right ascension:22h01m11.81s
Declination:-24°36'14.6"
Apparent magnitude:10.063
Proper motion RA:17
Proper motion Dec:-23.3
B-T magnitude:10.531
V-T magnitude:10.102

Catalogs and designations:
Proper Names
HD 1989HD 209068
TYCHO-2 2000TYC 6954-1509-1
USNO-A2.0USNO-A2 0600-43902874
HIPHIP 108702

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