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OB stars in the Leading Arm of the Magellanic Stream
C. Moni Bidin, D. I. Casetti-Dinescu, R. A. Mendez +4
We present our spectroscopic program aimed to study some new interesting features recently discovered in the Magellanic Cloud System. These were revealed by the spatial distributio…
Space Velocities of Southern Globular Clusters VII. NGC 6397, NGC 6626 (M 28) and NGC 6656 (M 22)
Dana I. Casetti-Dinescu, Terrence M. Girard, Lucie Jilkova +3
We have measured the absolute proper motions of globular clusters NGC 6397, NGC 6626 (M 22) and NGC 6656 (M 28) as part of our ongoing Southern Proper-Motion Program. The reference…
Variation of the Diameter of the Sun as Measured by the Solar Disk Sextant (SDS)
S. Sofia, T. M. Girard, U. J. Sofia +3
The balloon-borne Solar Disk Sextant (SDS) experiment has measured the angular size of the Sun on seven occasions spanning the years 1992 to 2011. The solar half-diameter -- observ…