Assertion: star's companion | /r/HasProperty | polaris ab
Facets:
Source sentences:
text: Polaris is a triple star system, composed of the primary star, Polaris Aa (a yellow supergiant), in orbit with a smaller companion (Polaris Ab); the pair in orbit with Polaris B (discovered in August 1779 by William Herschel).
text: The two smaller companions are Polaris B, a 1.39 M ☉ F3 main-sequence star orbiting at a distance of 2,400 astronomical units (AU), and Polaris Ab (or P), a very close F6 main-sequence star with a mass of 1.26 M ☉ .