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Multiperiodicities from the Hipparcos epoch photometry and possible pulsation in early A-type stars
A selection criterion based on the relative strength of the largestpeaks in the amplitude spectra, and an information criterion are used incombination to search for multiperiodicities in Hipparcos epochphotometry. The method is applied to all stars which have beenclassified as variable in the Hipparcos catalogue: periodic, unsolvedand microvariables. Results are assessed critically: although there aremany problems arising from aliasing, there are also a number ofinteresting frequency combinations which deserve further investigation.One such result is the possible occurrence of multiple periods of theorder of a day in a few early A-type stars. The Hipparcos catalogue alsocontains a number of these stars with single periodicities: such starswith no obvious variability classifications are listed, and informationabout their properties (e.g., radial velocity variations) discussed.These stars may constitute a new class of pulsators.

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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Dades d'Observació i Astrometria

Constel·lació:Columba
Ascensió Recta:05h51m21.36s
Declinació:-41°57'42.1"
Magnitud Aparent:8.957
Distancia:257.069 parsecs
Moviment propi RA:-0.9
Moviment propi Dec:1.5
B-T magnitude:10.353
V-T magnitude:9.073

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 39563
TYCHO-2 2000TYC 7606-437-1
USNO-A2.0USNO-A2 0450-02253568
HIPHIP 27656

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