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HD 199501


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Photometric study of the binary system S Equ
The Algol-type system S-Equ is observed yielding UBV photoelectric datawhich are examined in terms of the orbit eccentricity of the system. Theobservational data are found to contradict the orbit eccentricity, whilethe mass ratio confirms previous calculations. It is suggested that SEqu is a triple system based on the hypothesis that a third light sourcecomparable to the cooler component can account for the total flux of thesystem.

Lettera alla Direzione: Nuova variabile in Equuleus
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观测天体数据

星座:小馬座
右阿森松:20h57m31.94s
赤纬:+05°43'52.8"
视星:9.57
右阿森松适当运动:7.2
赤纬适当运动:-26.8
B-T magnitude:9.973
V-T magnitude:9.604

目录:
适当名称   (Edit)
HD 1989HD 199501
TYCHO-2 2000TYC 525-1011-1
USNO-A2.0USNO-A2 0900-19219466

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