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HD 16579


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Speckle Interferometry of New and Problem Hipparcos Binaries. II. Observations Obtained in 1998-1999 from McDonald Observatory
The Hipparcos satellite made measurements of over 9734 known doublestars, 3406 new double stars, and 11,687 unresolved but possible doublestars. The high angular resolution afforded by speckle interferometrymakes it an efficient means to confirm these systems from the ground,which were first discovered from space. Because of its coverage of adifferent region of angular separation-magnitude difference(ρ-Δm) space, speckle interferometry also holds promise toascertain the duplicity of the unresolved Hipparcos ``problem'' stars.Presented are observations of 116 new Hipparcos double stars and 469Hipparcos ``problem stars,'' as well as 238 measures of other doublestars and 246 other high-quality nondetections. Included in these areobservations of double stars listed in the Tycho-2 Catalogue andpossible grid stars for the Space Interferometry Mission.

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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Datos observacionales y astrométricos

Constelación:Triángulo
Ascensión Recta:02h40m31.28s
Declinación:+36°00'21.1"
Magnitud Aparente:8.311
Distancia:537.634 parsecs
Movimiento Propio en Ascensión Recta:17.4
Movimiento Propio en Declinación:-9.4
B-T magnitude:10.511
V-T magnitude:8.493

Catálogos y designaciones:
Nombres Propios
HD 1989HD 16579
TYCHO-2 2000TYC 2336-2006-1
USNO-A2.0USNO-A2 1200-01150610
HIPHIP 12465

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