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HD 178660


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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.

Stellar Spectra and Colors in Cygnus at Galactic Latitude + 14°.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1952ApJ...116..592M&db_key=AST

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Observation and Astrometry data

Constellation:Λύρα
Right ascension:19h07m21.37s
Declination:+46°05'07.2"
Apparent magnitude:7.698
Distance:826.446 parsecs
Proper motion RA:3.6
Proper motion Dec:12.8
B-T magnitude:9.754
V-T magnitude:7.868

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 178660
TYCHO-2 2000TYC 3541-3242-1
USNO-A2.0USNO-A2 1350-10220984
HIPHIP 93913

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