HD 10307 (HR 483) is a spectroscopic binary star in the constellation Andromeda.

HD 10307 was identified in September 2003 by astrobiologist Margaret Turnbull from the University of Arizona in Tucson as one of the most promising nearby candidates for hosting life based on her analysis of the HabCat list of stars.

[13] HR 483 B, the smaller component, appears to be a red dwarf, with as little as thirty-eight percent the mass of the sun.

[14] The presence of a moderately close companion could disrupt the orbit of a hypothetical planet in HD 10307's habitable zone.

The message was named Cosmic Call 2, it was sent on July 6, 2003, and it will arrive at HD 10307 in September 2044.