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HD 169328


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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.

Optical observations of ultraviolet objects. II - Classification and photometry /l = 0 to 145 deg/
UBV photometry and MK spectral classification are presented for a sampleof stars originally selected as UV objects from satellite photometrywith the S2/68 experiment. Although most stars of the sample arespectroscopically normal, a number of hot, subluminous stars were alsofound. Radial velocities are given for some of the stars observed. It isproposed that the majority of the apparently normal early B stars athigh galactic latitudes which are not runaway stars are subluminousdisc-population analogues of horizontal branch B stars of Population II.

Double star observations at the Lamont-Hussey Observatory of the University of Michigan at Bloemfontein, South Africa.
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Observation and Astrometry data

Constellation:Pavo
Right ascension:18h29m33.53s
Declination:-67°33'52.5"
Apparent magnitude:9.56
Proper motion RA:0.3
Proper motion Dec:-23.2
B-T magnitude:9.985
V-T magnitude:9.596

Catalogs and designations:
Proper Names
HD 1989HD 169328
TYCHO-2 2000TYC 9291-991-1
USNO-A2.0USNO-A2 0150-18467078
HIPHIP 90629

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