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In 1961 the astronomer George Van Biesbroeck published a catalog of low luminosity stars discovered using the Otto Struve refractor telescope of the McDonald Observatory in Texas. ==Survey and catalog== This survey is similar to earlier dim star surveys that were done by Max Wolf and Frank Elmore Ross but using later equipment and techniques that could detect even fainter stars. The stars in this catalog are all low luminosity stars that appear near known high proper motion stars in the telescope's field of view. The high proper motion indicates that the stars are close enough to Earth for a dim star to be seen with a large telescope. Presuming that these high proper motion stars might be binary stars with dim, previously undetected, companions. He took astrophotographs of the space around these stars looking for low luminosity stars that shared the high proper motions of the primary star. In general, the primary stars were too dim for a direct measurement of their distance by measuring their parallax at that time. The stars in this catalog are identified by the designation; ''VB''. The original list ended at 12 with most identified as gravitationally bound in a binary or multiple star system. He also identified an additional 17 known high proper motion stars he later found to have low luminosity stars in the field of view of the bright star. Many of these stars were found to be optical double stars, not gravitationally bound to another star, and not known to be part of a binary system. Most of the stars in this catalog are type K and M, red dwarf, stars, some with exceptionally low mass and luminosity. Three of the stars are type DC, white dwarf, stars. The star from this catalog that is known to be closest to Earth is VB 10, at about 19 light years distance. The original 1961 catalog has been updated for this table using the latest coordinates from SIMBAD as many of these objects have moved a considerable distance away from their 1961 positions. The original object designations for the primary stars are used but modified to be consistent with SIMBAD standards where necessary. One primary star was incorrectly identified and two primary stars could not be positively identified from the original catalog. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Van Biesbroeck's star catalog」の詳細全文を読む スポンサード リンク
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