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HD 218683


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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.

Spectral Classification of Red Variables Along the Galactic Equator.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1956ApJ...124..346C&db_key=AST

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Yontar
Sað Açýklýk:23h10m16.63s
Yükselim:-35°23'55.8"
Görünürdeki Parlaklýk:8.018
Uzaklýk:531.915 parsek
özdevim Sað Açýklýk:-1.7
özdevim Yükselim:-4.6
B-T magnitude:10.003
V-T magnitude:8.182

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 218683
TYCHO-2 2000TYC 7512-221-1
USNO-A2.0USNO-A2 0525-44139291
HIPHIP 114414

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