Apollo | asteroid | Apollo 11 | Apollo program | Apollo Theater | Apollo 13 | Asteroid belt | Apollo Theatre | Apollo 17 | Asteroid | Apollo 1 | Hammersmith Apollo | Apollo Command/Service Module | Apollo 8 | Apollo 13 (film) | Apollo 12 | Apollo Program | Apollo Guidance Computer | Apollo Computer | Amor asteroid | Apollo Lunar Module | Apollo 440 | The Apollo of Bellac | Apollo 10 | asteroid belt | Apollo Victoria Theatre | Apollo (mythology) | Apollo Belvedere | Strangford Apollo | Showtime at the Apollo |
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.