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Detection of a classical δ Scuti star in the new eclipsing binary system HIP 7666
HIP 7666 is a variable star newly discovered during the Hipparcosmission and classified as of unknown type (ESA 1997, The Hipparcos andTycho Catalogues, ESA SP-1200). During 23 nights between July 2000 andNovember 2000, over 2300 CCD observations in the V band were obtained.These data show that the new variable is a detached eclipsing binarysystem with an orbital period of 2.37229 days. In addition, one of thecomponents undergoes very short-period oscillations with a mainpulsation frequency of 24.46 or 25.47 c/d. HIP 7666 is therefore a newmember of the rare group of detached eclipsing binary systems with aδ Scuti type component.
| Four-color and H-beta photometry for O-A0 type stars in three regions near the galactic equator
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1982A&AS...49..561W&db_key=AST
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Osservazione e dati astrometrici
| Costellazione: | Perseo |
| Ascensione retta: | 01h39m30.64s |
| Declinazione: | +52°16'00.3" |
| Magnitudine apparente: | 8.023 |
| Distanza: | 292.398 parsec |
| Moto proprio RA: | -15.9 |
| Moto proprio Dec: | -20.7 |
| B-T magnitude: | 8.227 |
| V-T magnitude: | 8.04 |
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