Tucana IV is an ultra-faint dwarf galaxy that is a satellite to the Milky Way galaxy. It lies at a distance of 48 kiloparsecs in the constellation of Tucana. It has a size of 127 parsecs.
It passed within 4 kiloparsecs (possibly a collision event) with the Large Magellanic Cloud (LMC) approximately 120 million years ago. This close passage of the LMC altered the trajectory of the galaxy and its internal kinematics.
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