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HD 219256


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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.

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관측 및 측정 데이터

별자리:물병자리
적경:23h14m41.95s
적위:-09°41'18.4"
가시등급:7.535
거리:108.108 파섹
적경상의 고유운동:98.8
적위상의 고유운동:-33.8
B-T magnitude:7.865
V-T magnitude:7.563

천체목록:
일반명   (Edit)
HD 1989HD 219256
TYCHO-2 2000TYC 5821-745-1
USNO-A2.0USNO-A2 0750-21422320
HIPHIP 114752

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