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HD 201066


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Ca II H and K Filter Photometry on the UVBY System. II. The Catalog of Observations
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1995AJ....109.2828T&db_key=AST

Ca II H and K filter photometry on the UVBY system. I - The standard system
A fifth filter (fwhm = 90 A) centered on Ca II H and K has beendeveloped for use with the standard uvby system. The filter, called Ca,is designed primarily for applications to metal-poor dwarfs and redgiants, regions where the uvby metallicity index, m(l), loses somesensitivity. An index, hk, is defined by replacing v in m(l) by Ca. Theeffects of interstellar extinction on the index are modeled anddemonstrated to be modest and relatively insensitive to spectral type.Observations of V, (b-y), and hk for 163 primary standards are detailedand transformed to the standard V and (b-y) system. A qualitativeanalysis using only the primary standards indicates that hk is moresensitive than m(l) over the regions of interest by about a factor of 3.

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观测天体数据

星座:寶瓶座
右阿森松:21h07m21.87s
赤纬:-00°45'54.5"
视星:6.586
距离:172.117 天文距离
右阿森松适当运动:1.3
赤纬适当运动:19.8
B-T magnitude:7.976
V-T magnitude:6.701

目录:
适当名称   (Edit)
HD 1989HD 201066
TYCHO-2 2000TYC 5192-2046-1
USNO-A2.0USNO-A2 0825-19008577
HIPHIP 104265

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