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HD 191957


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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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观测天体数据

星座:人馬座
右阿森松:20h13m41.61s
赤纬:-34°07'06.6"
视星:6.949
距离:133.156 天文距离
右阿森松适当运动:22.6
赤纬适当运动:-21.7
B-T magnitude:8.182
V-T magnitude:7.051

目录:
适当名称   (Edit)
HD 1989HD 191957
TYCHO-2 2000TYC 7449-342-1
USNO-A2.0USNO-A2 0525-42169138
HIPHIP 99681

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