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HD 31939


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관련 글

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.

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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관측 및 측정 데이터

별자리:조각칼자리
적경:04h58m33.22s
적위:-28°53'15.9"
가시등급:7.388
거리:769.231 파섹
적경상의 고유운동:0.7
적위상의 고유운동:-3.5
B-T magnitude:9.504
V-T magnitude:7.563

천체목록:
일반명   (Edit)
HD 1989HD 31939
TYCHO-2 2000TYC 6472-1747-1
USNO-A2.0USNO-A2 0600-02076062
HIPHIP 23125

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