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HD 189085

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Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS Radial velocities have been determined for a sample of 2930 B2-F5 stars,95% observed by the Hipparcos satellite in the north hemisphere and 80%without reliable radial velocity up to now. Observations were obtainedat the Observatoire de Haute Provence with a dispersion of 80Ä,mm(-1) with the aim of studying stellar and galactic dynamics.Radial velocities have been measured by correlation with templates ofthe same spectral class. The mean obtained precision is 3.0 km s(-1)with three observations. A new MK spectral classification is estimatedfor all stars. Based on observations made at the Haute ProvenceObservatory, France and on data from The Hipparcos Catalogue, ESA.Tables 4, 5 and 6 are only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr or viahttp://cdsweb.u-strasbg.fr/Abstract.htm
Lists of photometric AM candidates The Geneva photometric m parameter (Nicolet and Cramer, 1982) is used inorder to select Am photometric candidates from the Rufener (1981)catalogue. Two lists are given, the first containing field stars and thesecond cluster stars. According to the photometric criteria thediffusion process probably responsible for the Am phenomenon takes placerather quickly as Am candidates are present in young clusters. It isconfirmed that the phenomenon is enhanced by low rotational velocity andhigh metallicity. The age seems to slightly affect the Am phenomenon.
Properties of AM stars in the Geneva photometric system Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980A&A....92..289H&db_key=AST
Catalogue of early-type stars measured in a narrow-band photometric system A compilation of the photoelectric measurements in the Barbier-Morguleffsystem is presented. The catalogue includes data for 773 stars ofspectral type 08 to F6. 706 stars have been measured at least twice.
Multicolor photometry of metallic-line stars. III. A photometric catalogue Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974RMxAA...1..175M&db_key=AST
Photometry in the Cygnus X-1 field Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&A....30..467M&db_key=AST
On the Distance to Cygnus X-1 Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973ApJ...185L.113M&db_key=AST
Catalogue of AM stars with known spectral types Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973A&AS...10..385H&db_key=AST
Catalogue et bibliographie des étoiles A à spectre particulier - Deuxième supplément Not Available
Catalogue et bibliographie des étoiles A à spectre particulier Premier supplément Not Available
Peculiar and Metallic-Line a - Stars in a Galactic Zone. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1959ApJ...129...88S&db_key=AST

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观测天体数据

星座:	天鵝座
右阿森松:	19^h56^m53.35^s
赤纬:	+35Â°32'12.9"
视星:	8.204
距离:	147.929 天文距离
右阿森松适当运动:	13.8
赤纬适当运动:	34.2
B-T magnitude:	8.587
V-T magnitude:	8.236

目录:

适当名称
HD 1989	HD 189085
TYCHO-2 2000	TYC 2677-1230-1
USNO-A2.0	USNO-A2 1200-13905634
HIP	HIP 98157

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