University of Wisconsin

Space Astronomy Laboratory



OBJECT: Sanduleak 69-239
Other names: HD269902
ID # 4516

UW Astronomer: Chris Anderson

Sanduleak 69-239 is a tenth magnitude star in the Large Magellanic Cloud. It has been shown to be polarized in the optical by about three percent.

The Large Magellanic Cloud (LMC) is a satellite galaxy of our own Milky Way Galaxy, about 150,000 light years away from us. We now have indications that it has a different (smaller) amount of heavier elements than ours. Studies of interstellar dust, which may carry a sizable fraction of the interstellar heavy elements in a galaxy, will be important in comparative studies of the evolution of the LMC and the Galaxy.