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HD 160257


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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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Osservazione e dati astrometrici

Costellazione:Ofiuco
Ascensione retta:17h39m55.63s
Declinazione:-23°03'40.9"
Magnitudine apparente:8.587
Distanza:80.841 parsec
Moto proprio RA:-12.1
Moto proprio Dec:-32.6
B-T magnitude:9.315
V-T magnitude:8.648

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 160257
TYCHO-2 2000TYC 6827-385-1
USNO-A2.0USNO-A2 0600-28021775
HIPHIP 86455

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