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HD 141106


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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.

Walraven photometry of nearby southern OB associations
Homogeneous Walraven (VBLUW) photometry is presented for 5260 stars inthe regions of five nearby southern OB associations: Scorpio Centaurus(Sco OB2), Orion OB1, Canis Major OB1, Monoceros OB1, and Scutum OB2.Derived V and (B - V) in the Johnson system are included.

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Osservazione e dati astrometrici

Costellazione:Scorpione
Ascensione retta:15h48m08.75s
Declinazione:-23°21'32.2"
Magnitudine apparente:9.188
Moto proprio RA:-28
Moto proprio Dec:-28
B-T magnitude:9.859
V-T magnitude:9.244

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 141106
TYCHO-2 2000TYC 6778-975-1
USNO-A2.0USNO-A2 0600-18764832
HIPHIP 77406

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