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HD 172160

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Two-colour photometry for 9473 components of close Hipparcos double and multiple stars Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.
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.
Double star observations at the Lamont-Hussey Observatory of the University of Michigan at Bloemfontein, South Africa. Not Available

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Osservazione e dati astrometrici

Costellazione:	Corona Australe
Ascensione retta:	18^h40^m45.73^s
Declinazione:	-43Â°30'09.5"
Magnitudine apparente:	8.464
Distanza:	182.482 parsec
Moto proprio RA:	-1
Moto proprio Dec:	-32.6
B-T magnitude:	8.987
V-T magnitude:	8.508

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 172160
TYCHO-2 2000	TYC 7927-1456-1
USNO-A2.0	USNO-A2 0450-35274394
HIP	HIP 91592

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