University of Wisconsin

Space Astronomy Laboratory

ASTRO - 2

WUPPE

OBJECT: Beta Ursa Majoris (Bet-UMa)
Other names: HD95418
ID # 0608

UW Astronomer: Art Code


Beta Ursa Majoris is only 62 light years away from the Earth. This star is a very bright, normal blue star in the constellation Ursa Major (the "Big Dipper"). Beta Ursa Majoris, together with Alpha Ursa Majoris, is known as the pointer, because a line drawn northward through them points to Polaris, the Pole Star. It has been determined from ground-based observations to have essentially no polarization and will hence be used to determine, to high precision, the WUPPE signal that corresponds to zero polarization at the various ultraviolet wavelengths.