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HD 187657 (V1465 Aql)


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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.

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Osservazione e dati astrometrici

Costellazione:Aquila
Ascensione retta:19h50m55.17s
Declinazione:+06°49'24.9"
Magnitudine apparente:9.21
Moto proprio RA:6.7
Moto proprio Dec:-11.2
B-T magnitude:9.6
V-T magnitude:9.243

Cataloghi e designazioni:
Nomi esattiV1465 Aql
HD 1989HD 187657
TYCHO-2 2000TYC 492-1519-1
USNO-A2.0USNO-A2 0900-16799217
HIPHIP 97664

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