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Eleanor Key Francis "Glo" Helin (née Francis) (November 19, 1932 – January 25, 2009) was an American astronomer. She was principal investigator of the Near Earth Asteroid Tracking (NEAT) program of NASA's Jet Propulsion Laboratory. She retired in 2002.

Helin discovered or co-discovered 872 asteroids, including the first two Aten asteroids: 2062 Aten and 2100 Ra-Shalom; the Apollo asteroids 4660 Nereus, 4769 Castalia and others; various Amor asteroids; three Trojan asteroids including 3240 Laocoon; and 9969 Braille.