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HD 172834


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Mining in the HIPPARCOS raw data
The Hipparcos solutions flagged as unreliable after the completion ofthe standard data processing have been systematically revisited in thelight of additional information, primarily related to theirmultiplicity. In many cases improved solutions have been obtained,yielding at the same time an Hipparcos based separation and positionangle and a better astrometric solution for the system. The principlesapplied in this reprocessing are explained and more than a hundred newsolutions with absolute and relative astrometry are presented anddiscussed. Tables 1 to 7 are also available in electronic form at theCDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html

SANTIAGO 91, a right ascension catalogue of 3387 stars (equinox J2000).
The positions in right ascension of 3387 stars belonging to the Santiago67 Catalogue, observed with the Repsold Meridian Circle at Cerro Calan,National Astronomical Observatory, during the period 1989 to 1994, aregiven. The average mean square error of a position, for the wholeCatalogue, is +/-0.009 s. The mean epoch of the catalogue is 1991.84.

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Observation and Astrometry data

Constellation:Sagittaire
Right ascension:18h43m43.37s
Declination:-32°29'20.5"
Apparent magnitude:9.254
Proper motion RA:5.9
Proper motion Dec:-1.4
B-T magnitude:11.033
V-T magnitude:9.401

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 172834
TYCHO-2 2000TYC 7411-399-1
USNO-A2.0USNO-A2 0525-38090794
HIPHIP 91866

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