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HD 128216


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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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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Pergel
Sað Açýklýk:14h38m46.85s
Yükselim:-66°07'52.4"
Görünürdeki Parlaklýk:8.866
Uzaklýk:5263.158 parsek
özdevim Sað Açýklýk:-5.5
özdevim Yükselim:-6.3
B-T magnitude:9.001
V-T magnitude:8.878

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 128216
TYCHO-2 2000TYC 9019-1316-1
USNO-A2.0USNO-A2 0225-20601584
HIPHIP 71613

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