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Using the 2 m telescope of the Bulgarian National Astronomical Observatory at Rozhen observations of 30 double or multiple stars were carried out during two half nights on July 20 and 21, 2009. This i...
The formation of binary and multiple stars in clusters
Multiple stars with both inner and outer orbits observed Spectroscopically。
Statistics of multiple stars     multiple stars  Statistics       2009/6/16
Statistics of multiple stars
The author presents her CCD measurements of 105 double and multiple stars performed with a ST-6 camera on the Belgrade Large Refractor (Zeiss 65/1055 cm).
With the 2-m telescope of the Bulgarian National Astronomical Observatory at Rozhen observations of fifteen multiple stars were carried out during one night - October 17/18, 2004. In the paper we pr...
Using the 2-m telescope of the Bulgarian National Astronomical Observatory at Rozhen observations of twenty multiple stars were carried out during one whole night - October 30/31, and, also, during ...
Using the 2-m telescope of the Bulgarian National Astronomical Observatory at Rozhen, observations of 55 multiple stars were carried out during one night, December 16/17. 2006. This is the third ser...

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