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Semi-major axis. 17.737 au: Eccentricity: 0.96658: Orbital period (sidereal) ... Halley's Comet is the only known short-period comet that is consistently visible to ...
Semi-major axis ~440 AU (epoch 2000) [1] Eccentricity: 0.99978: ... The year 1910 saw considerable media interest in the predicted return of Halley's Comet, which ...
Minor planets in comet-like orbits similar to HTCs that never come close enough to the Sun to outgas are called centaurs. HTCs are named after the first discovered member, and the first discovered periodic comet, Halley's Comet, which orbits the Sun in about 75 years, and passing as far as the orbit of Neptune.
The semi-major axis, a, is also the path-averaged distance to the centre of mass, [2] ... Halley's Comet has a value of 0.967. Non-periodic comets follow near- ...
Semi-major axis: 1,700 AU (outbound) Eccentricity: ... Comet Hyakutake ... (Halley's Comet is about 15 km (9.3 mi) across, while Comet Hale–Bopp was about 60 km (37 ...
Semi-major axis: 177 au: Eccentricity: 0.99498: Orbital period ... making a far greater impact on the general public than the return of Halley's Comet in 1986, and ...
Semi-major axis: 27.398 AU: Eccentricity: 0.9931: ... is a Halley-type comet discovered by John E. Mellish on 19 March 1917. The comet has an orbital period of 143 ...
The Halley Armada describes the collection of spacecraft missions that visited and/or made observations of Halley's Comet 1980s perihelion. The space shuttle Challenger was intended to do a study of Halley's Comet in 1986, but exploded shortly after being launched. Deep Impact. Debate continues about how much ice is in a comet.