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TYC 5784-205-1


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Search for associations containing young stars (SACY). I. Sample and searching method
We report results from a high-resolution optical spectroscopic surveyaimed to search for nearby young associations and young stars amongoptical counterparts of ROSAT All-Sky Survey X-ray sources in theSouthern Hemisphere. We selected 1953 late-type (B-V~≥~0.6),potentially young, optical counterparts out of a total of 9574 1RXSsources for follow-up observations. At least one high-resolutionspectrum was obtained for each of 1511 targets. This paper is the firstin a series presenting the results of the SACY survey. Here we describeour sample and our observations. We describe a convergence method in the(UVW) velocity space to find associations. As an example, we discuss thevalidity of this method in the framework of the β Pic Association.

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Observation and Astrometry data

Constellation:Capricornus
Right ascension:21h12m22.38s
Declination:-14°59'57.6"
Apparent magnitude:8.238
Distance:47.916 parsecs
Proper motion RA:50.1
Proper motion Dec:-22.1
B-T magnitude:9.093
V-T magnitude:8.309

Catalogs and designations:
Proper Names
TYCHO-2 2000TYC 5784-205-1
USNO-A2.0USNO-A2 0750-20688296
HIPHIP 104687

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