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HD 84309


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Estimation of stellar intrinsic colours, distances and colour excesses based on the Stromgren and H-beta photometry of 804 B, A, and F stars in 10 Selected Areas
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1989A&AS...78..105F&db_key=AST

Four-colour UVBY and H-beta photometry of all A3 to F5 stars brighter than m(pg) = about 11.0 mag in 6 Selected Areas close to the Galactic plane
Photometric observations of 540 A3-F5 stars in Selected Areas 171, 173,175, 177, 192, and 195 of the Potsdam survey (Becker and Brueck,1929-1938) are reported. Data obtained in the Stromgren uvby-beta systemusing a 6-channel spectrograph-photometer on the 50-cm Danish telescopeat ESO on 98 nights during 1986-1987 are presented in extensive tablesand graphs and briefly characterized. Comparisons with previousobservations of some program stars reveal no systematic differences inmagnitude or spectral indices.

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Observation and Astrometry data

Constellation:りゅうこつ座
Right ascension:09h42m06.20s
Declination:-60°33'09.3"
Apparent magnitude:9.031
Proper motion RA:0.2
Proper motion Dec:10.3
B-T magnitude:9.571
V-T magnitude:9.076

Catalogs and designations:
Proper Names
HD 1989HD 84309
TYCHO-2 2000TYC 8941-1747-1
USNO-A2.0USNO-A2 0225-06513818
HIPHIP 47580
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