University of Wisconsin

Space Astronomy Laboratory

ASTRO - 2

WUPPE

OBJECT: HD 217490
ID # 4569

UW Astronomer: Chris Anderson


HD217490 is a very hot star of magnitude 8.7. We use it as a background source of light through the dust in the cluster. It is 4.0% polarized in visible light. This is the first time ultraviolet polarization will be obtained for this star.