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TYC 1996-1718-1


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Pulkovo compilation of radial velocities for 35495 stars in a common system.
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U, V, W velocity components for the old disk using radial velocities of 1295 stars in the three cardinal Galactic directions
New radial velocities are presented for 1295 stars chosen at random nearthe three cardinal Galactic directions of l = 180 deg, b = 0; l = 90deg, b = 0 deg; and b = 90 deg, giving the distribution in U, V, and W,respectively, from the radial velocities alone. The measurements weremade with the coude spectrograph of the Mount Wilson 100 in. Hookerreflector. The purpose of the program is to set limits on the densitynormalization in the solar neighborhood of the old thin disk, the oldthick disk, and the halo. Many more high-velocity stars are present inthe unbiased sample than expected from previous estimates of thenormalization. The data suggest the density ratios in the solarneighborhood to be about 90 percent, 10 percent, and about 0.5 percentfor the thin disk, thick disk, and halo populations, respectively.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Berenisin Saci
Sað Açýklýk:13h10m26.27s
Yükselim:+26°17'04.8"
Görünürdeki Parlaklýk:10.593
özdevim Sað Açýklýk:-2.7
özdevim Yükselim:-7.3
B-T magnitude:11.494
V-T magnitude:10.668

Kataloglar ve belirtme:
Özgün isimleri
TYCHO-2 2000TYC 1996-1718-1
USNO-A2.0USNO-A2 1125-06667354
HIPHIP 64280

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