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HD 221512


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Pulkovo compilation of radial velocities for 35495 stars in a common system.
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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.

Radial-velocity measurements. V - Ground support of the HIPPARCOS satellite observation program
The paper presents data on 1070 radial velocity measurements of starsdistributed in 39 fields measuring 4 deg x 4 deg. The PPO series ofFehrenbach et al. (1987) and Duflot et al. (1990) is continued using theFehrenbach objective prism method.

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Osservazione e dati astrometrici

Costellazione:Cefeo
Ascensione retta:23h32m11.57s
Declinazione:+65°44'20.9"
Magnitudine apparente:6.648
Distanza:132.626 parsec
Moto proprio RA:61.7
Moto proprio Dec:7
B-T magnitude:6.91
V-T magnitude:6.67

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 221512
TYCHO-2 2000TYC 4292-993-1
USNO-A2.0USNO-A2 1500-09839061
HIPHIP 116161
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