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HD 159897


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Broad-band photometry of selected southern ultraviolet-bright stars.
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The local system of early type stars - Spatial extent and kinematics
Published uvby and H-beta photometric data and proper motions arecompiled and analyzed to characterize the structure and kinematics ofthe bright early-type O-A0 stars in the solar vicinity, with a focus onthe Gould belt. The selection and calibration techniques are explained,and the data are presented in extensive tables and graphs and discussedin detail. The Gould belt stars of age less than 20 Myr are shown togive belt inclination 19 deg to the Galactic plane and node-lineorientation in the direction of Galactic rotation, while the symmetricaldistribution about the Galactic plane and kinematic properties (purecircular differential rotation) of the belt stars over 60 Myr oldresemble those of fainter nonbelt stars of all ages. The unresolveddiscrepancy between the expansion observed in the youngest nearby starsand the predictions of simple models of expansion from a point isattributed to the inhomogeneous distribution of interstellar matter.

Four-colour and H-beta photometry for early type stars in three southern galactic regions
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980A&AS...41...85L&db_key=AST

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Observation and Astrometry data

Constellation:Σκορπιός
Right ascension:17h38m37.52s
Declination:-33°03'07.3"
Apparent magnitude:8.317
Distance:237.53 parsecs
Proper motion RA:-7
Proper motion Dec:-9.8
B-T magnitude:8.387
V-T magnitude:8.323

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 159897
TYCHO-2 2000TYC 7380-983-1
USNO-A2.0USNO-A2 0525-28723310
HIPHIP 86342

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