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HD 126425


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Speckle Interferometry of New and Problem HIPPARCOS Binaries
The ESA Hipparcos satellite made measurements of over 12,000 doublestars and discovered 3406 new systems. In addition to these, 4706entries in the Hipparcos Catalogue correspond to double star solutionsthat did not provide the classical parameters of separation and positionangle (rho,theta) but were the so-called problem stars, flagged ``G,''``O,'' ``V,'' or ``X'' (field H59 of the main catalog). An additionalsubset of 6981 entries were treated as single objects but classified byHipparcos as ``suspected nonsingle'' (flag ``S'' in field H61), thusyielding a total of 11,687 ``problem stars.'' Of the many ground-basedtechniques for the study of double stars, probably the one with thegreatest potential for exploration of these new and problem Hipparcosbinaries is speckle interferometry. Results are presented from aninspection of 848 new and problem Hipparcos binaries, using botharchival and new speckle observations obtained with the USNO and CHARAspeckle cameras.

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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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Coban
Sað Açýklýk:14h24m13.46s
Yükselim:+42°39'41.8"
Görünürdeki Parlaklýk:8.277
Uzaklýk:270.27 parsek
özdevim Sað Açýklýk:-33.5
özdevim Yükselim:9.1
B-T magnitude:9.476
V-T magnitude:8.376

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 126425
TYCHO-2 2000TYC 3041-266-1
USNO-A2.0USNO-A2 1275-08436761
HIPHIP 70403

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