Is this the first interstellar comet?

Is this the first interstellar comet?

C / 2017 U1 was discovered on October 18th with the PAN-STARRS telescope of the Haleakala Observatory in Hawaii. The comet was currently thirty million miles away from the earth. The speed of the comet is 26 kilometers per second. The object passed the sun on September 9th and is currently leaving the solar system. The comet with a magnitude of 21 is weak and therefore only visible with powerful telescopes.

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