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HD 121047


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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.

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Observation and Astrometry data

Constellation:Ursa Major
Right ascension:13h51m57.25s
Declination:+51°08'55.0"
Apparent magnitude:8.735
Distance:301.205 parsecs
Proper motion RA:4.1
Proper motion Dec:14.6
B-T magnitude:9.094
V-T magnitude:8.765

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 121047
TYCHO-2 2000TYC 3470-1167-1
USNO-A2.0USNO-A2 1350-08339167
HIPHIP 67686

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