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HD 171944


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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:거문고자리
적경:18h35m37.11s
적위:+40°46'10.7"
가시등급:7.739
거리:191.939 파섹
적경상의 고유운동:2.7
적위상의 고유운동:-5.2
B-T magnitude:8.058
V-T magnitude:7.766

천체목록:
일반명   (Edit)
HD 1989HD 171944
TYCHO-2 2000TYC 3109-1060-1
USNO-A2.0USNO-A2 1275-10160426
HIPHIP 91145

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