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HD 194810


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ICCD speckle observations of binary stars. II - Measurements during 1982-1985 from the Kitt Peak 4 M telescope
This paper represents the continuation of a systematic program of binarystar speckle interferometry initiated at the 4 m telescope on Kitt Peakin late 1975. Between 1975 and 1981, the observations were obtained witha photographic speckle camera, the data from which were reduced byoptical analog methods. In mid-1982, a new speckle camera employing anintensified charge-coupled device as the detector continued the programand necessitated the development of new digital procedures for reducingand analyzing speckle data. The camera and the data-processingtechniques are described herein. This paper presents 2780 newmeasurements of 1012 binary and multiple star systems, including thefirst direct resolution of 64 systems, for the interval 1982 through1985.

Estimation of spectral classifications for bright southern stars with interesting Stromgren indices
This paper investigates the degree of success with which uvby photometrycan be applied to predict spectral classifications for 947 A, F, and Gstars brighter than an apparent magnitude of 8.3 and with four-colorindices indicating some kind of interesting, unusual, or peculiarspectrum. One or several possible spectral classifications are estimatedfor each star from photometry alone, double stars are distinguished, andthe estimates are compared with published classifications. The resultsshow that the framework provided by uvby photometry can be extended toinclude most G and K stars, reddened stars, peculiar stars, and certaintypes of double star.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Oglak
Sað Açýklýk:20h28m29.30s
Yükselim:-24°09'47.7"
Görünürdeki Parlaklýk:7.089
Uzaklýk:156.495 parsek
özdevim Sað Açýklýk:38.3
özdevim Yükselim:-105.1
B-T magnitude:8.181
V-T magnitude:7.18

Kataloglar ve belirtme:
Özgün isimleri
HD 1989HD 194810
TYCHO-2 2000TYC 6907-842-1
USNO-A2.0USNO-A2 0600-42675727
HIPHIP 100985

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