Comet 2I/Borisov (2I) is the first known interstellar comet and only the second interstellar object identified in the solar system. It likely originated in the protoplanetary disk of another star. Scientific interest in 2I centers on characterizing this object, both to compare it with the first interstellar body, 1I/ʻOumuamua, and with the comet populations of the solar system.
In this talk, I will present high-resolution imaging observations of 2I taken with the Hubble Space Telescope, focusing on (1) the effective size of the nucleus, (2) detailed morphological examination of the coma, and (3) photometric outburst and splitting events. Overall, our observations reveal that 2I resembles a typical solar system comet.