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HD 145766


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Cepheid studies. III - Energy changes in the beat Cepheid U Trianguli Australis
Four hundred and eighty-one UBVRI observations of the beat Cepheid U TrAobtained in the 1977 season are reported. The V luminosities have beenFourier analyzed to provide both improved estimates for the periods, andamplitude and phase values for the double-mode Fourier terms. Acomparison with extensive observations made 18 years ago indicates thatthere has been a redistribution of pulsation energy in favor of thefirst overtone at the expense of the fundamental. It is postulated thatthis is not due to mode-switching, but rather to the intermode couplingthat exists between the two pulsations.

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观测天体数据

星座:南三角座
右阿森松:16h16m38.82s
赤纬:-64°09'52.1"
视星:8.044
距离:285.714 天文距离
右阿森松适当运动:1.2
赤纬适当运动:-22
B-T magnitude:9.217
V-T magnitude:8.141

目录:
适当名称   (Edit)
HD 1989HD 145766
TYCHO-2 2000TYC 9044-202-1
USNO-A2.0USNO-A2 0225-24983931
HIPHIP 79751

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