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HD 197681


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Searching for unknown open clusters in the Tycho-2 catalog
We present 11 new open cluster candidates found in a systematic searchfor unknown star clusters using the astrometric and photometric dataincluded in the Tycho 2 catalog. The possible existence of these stellaraggregates is supported by the analysis of proper motions,color-magnitude diagrams, stellar density distributions, and by thevisual inspection of the Digitized Sky Survey (DSS) plates. With thesetools we were able to determine mean absolute proper motions as well aspreliminary reddenings, distances and ages for the majority of thecandidates. We found that most of them are possibly nearby (closer than~ 600 pc) open clusters never studied before.Based on observations of the ESA Hipparcos satellite.Figures 1 and 2 are only available in electronic form athttp://www.edpsciences.org

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观测天体数据

星座:狐狸座
右阿森松:20h44m35.36s
赤纬:+23°37'29.9"
视星:8.1
距离:4545.455 天文距离
右阿森松适当运动:3.6
赤纬适当运动:-4.1
B-T magnitude:8.041
V-T magnitude:8.096

目录:
适当名称   (Edit)
HD 1989HD 197681
TYCHO-2 2000TYC 2170-2273-1
USNO-A2.0USNO-A2 1125-16890364
HIPHIP 102374

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