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HD 173026


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Radial velocity measurements. II - Ground-based observations of the program stars for the HIPPARCOS satellite
New radial velocities for 446 stars of magnitude 9.0 or brighter in 1616-sq-deg fields of the Northern Hemisphere are determined by automaticPDS measurement of 80-A/mm-dispersion spectra obtained at theObservatoire de Haute Provence using a 17-cm-diameter objective prism.The fields were selected to provide data for the input catalog of theESA Hipparcos astrometric satellite. The measurement techniques andprecision are discussed, and the results are presented in extensivetables and graphs.

Meridian observations made with the Carlsberg Automatic Meridian Circle at Brorfelde (Copenhagen University Observatory) 1981-1982
The 7-inch transit circle instrument with which the present position andmagnitude catalog for 1577 stars with visual magnitudes greater than11.0 was obtained had been equipped with a photoelectric moving slitmicrometer and a minicomputer to control the entire observationalprocess. Positions are reduced relative to the FK4 system for each nightover the whole meridian rather than the usual narrow zones. Thepositions of the FK4 stars used in the least squares solution are alsogiven in the catalog.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Herkul
Sað Açýklýk:18h42m44.72s
Yükselim:+14°50'32.3"
Görünürdeki Parlaklýk:7.211
Uzaklýk:167.504 parsek
özdevim Sað Açýklýk:-0.6
özdevim Yükselim:11.6
B-T magnitude:7.218
V-T magnitude:7.212

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 173026
TYCHO-2 2000TYC 1037-38-1
USNO-A2.0USNO-A2 0975-12754009
HIPHIP 91764

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