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HD 18408


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CCD photometry and astrometry of visual double and multiple stars of the HIPPARCOS Catalogue. II. CCD photometry and differential astrometry of 288 southern ``Intermediate'' systems
We present photometric and astrometric data of about 280 visual doublestars of the ``intermediate'' class, i.e. with angular separationsmainly in the range 2arcsec < rho < 12arcsec . The observationshave been obtained in 1991-92 with a CCD camera attached to the 91 cmDutch telescope at ESO La Silla, Chile. Differential magnitudes of thedouble star components as well as magnitudes and colour indices of theindividual components have been determined in the Cousins V and Ipassbands with an internal error of about 0.005 mag and an externalaccuracy of less than 0.03 mag. In addition, angular separations havebeen secured to an internal accuracy of 0.004arcsec and position anglesto about 0.05degr. Tables 1 to 4 are only available in electronic format the CDS via ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html. Based on observationscollected at the European Southern Observatory, La Silla, Chile.

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观测天体数据

星座:時鐘座
右阿森松:02h54m23.08s
赤纬:-63°00'21.0"
视星:8.574
距离:142.248 天文距离
右阿森松适当运动:-5.2
赤纬适当运动:-26.5
B-T magnitude:9.104
V-T magnitude:8.618

目录:
适当名称
HD 1989HD 18408
TYCHO-2 2000TYC 8862-715-1
USNO-A2.0USNO-A2 0225-00723032
HIPHIP 13541

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