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HD 39304

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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-color and H-beta photometry for O-A0 type stars in three regions near the galactic equator Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1982A&AS...49..561W&db_key=AST
Interstellar extinction and ultraviolet flux distribution of the Crab Nebula Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1981ApJ...245..581W&db_key=AST
Vitesses radiales dans 4 champs de petite latitude galactique. Not Available

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Osservazione e dati astrometrici

Costellazione:	Toro
Ascensione retta:	05^h52^m58.64^s
Declinazione:	+28Â°27'39.1"
Magnitudine apparente:	9.216
Moto proprio RA:	-0.3
Moto proprio Dec:	-3
B-T magnitude:	9.231
V-T magnitude:	9.218

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 39304
TYCHO-2 2000	TYC 1875-2194-1
USNO-A2.0	USNO-A2 1125-02945977
HIP	HIP 27800

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