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HD 194049


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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.

UVBY photometry of HIPPARCOS stars
Photoelectric data in the uvby system have been obtained for 367southern stars of the Hipparcos Input Catalogue. Most of the stars are Fand G main sequence and fall in the magnitude range V = 9 to 10.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Yay
Sað Açýklýk:20h25m01.99s
Yükselim:-40°58'25.3"
Görünürdeki Parlaklýk:9.438
özdevim Sað Açýklýk:54.8
özdevim Yükselim:-31.2
B-T magnitude:10.257
V-T magnitude:9.506

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 194049
TYCHO-2 2000TYC 7953-520-1
USNO-A2.0USNO-A2 0450-38877584
HIPHIP 100706

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