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HD 197954


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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.

Radial velocities of southern stars obtained with the photoelectric scanner CORAVEL. III - 790 late-type bright stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1985A&AS...59...15A&db_key=AST

Final catalogue of 229 photometric standards in UBV system near the selected areas 1-115
Not Available

Photoelectric radial velocities. V. 69 southern HR stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972MNRAS.155..449G&db_key=AST

The corrected magnitudes and colours of 278 stars near S.A. 1-139 in the UBV system
Not Available

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Osservazione e dati astrometrici

Costellazione:Acquario
Ascensione retta:20h47m03.60s
Declinazione:-02°29'12.0"
Magnitudine apparente:6.27
Distanza:241.546 parsec
Moto proprio RA:-20.1
Moto proprio Dec:-20.8
B-T magnitude:8.358
V-T magnitude:6.452

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 197954
TYCHO-2 2000TYC 5182-2292-1
USNO-A2.0USNO-A2 0825-18705397
BSC 1991HR 7946
HIPHIP 102561
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