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TYC 6502-874-1


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New periodic variables from the Hipparcos epoch photometry
Two selection statistics are used to extract new candidate periodicvariables from the epoch photometry of the Hipparcos catalogue. Theprimary selection criterion is a signal-to-noise ratio. The dependenceof this statistic on the number of observations is calibrated usingabout 30000 randomly permuted Hipparcos data sets. A significance levelof 0.1 per cent is used to extract a first batch of candidate variables.The second criterion requires that the optimal frequency be unaffectedif the data are de-trended by low-order polynomials. We find 2675 newcandidate periodic variables, of which the majority (2082) are from theHipparcos`unsolved' variables. Potential problems with theinterpretation of the data (e.g. aliasing) are discussed.

The 74th Special Name-list of Variable Stars
We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.

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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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Guvercin
Sað Açýklýk:05h49m05.25s
Yükselim:-28°22'46.9"
Görünürdeki Parlaklýk:8.464
Uzaklýk:1515.152 parsek
özdevim Sað Açýklýk:17.7
özdevim Yükselim:-17.8
B-T magnitude:10.642
V-T magnitude:8.644

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
TYCHO-2 2000TYC 6502-874-1
USNO-A2.0USNO-A2 0600-02654526
HIPHIP 27473

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