Orionid Meteor Shower Peaks This Week: Halley’s Comet Debris Lights Up Predawn Sky

One of autumn’s most reliable meteor showers reaches its peak this week, offering skywatchers a chance to witness fragments of Halley’s Comet streaking through Earth’s atmosphere.

The Orionid meteor shower will climax overnight Wednesday (Oct. 21) into Thursday (Oct. 22), potentially producing up to 20 meteors per hour under dark skies, according to Time and Date. The shower occurs when Earth passes through the debris trail left by Halley’s Comet, which last visited the inner solar system in 1986 and will not return until 2061.

Although Halley’s Comet currently resides beyond the orbit of Neptune, its dusty legacy remains scattered along its orbital path. Each passage through the inner solar system causes solar heating to liberate dust and rocky particles, which Earth encounters twice annually — first during the Orionids in October, and again during the Eta Aquariids in May.

The Orionids are notably swift, striking the atmosphere at roughly 41 miles per second (66 kilometers per second). They frequently produce bright streaks, occasional fireballs, and persistent trains — glowing ionization trails that linger briefly after the meteor vanishes. The naked eye is ideal for observing the shower, though binoculars or a small telescope can enhance the broader skywatching experience during peak fall viewing season.

This year presents a minor obstacle: a 71%-illuminated waxing gibbous moon will brighten much of the night, reducing meteor visibility. However, the moon sets early Thursday morning, opening a valuable window of darkness before dawn — precisely when the constellation Orion stands highest in the sky, making the predawn hours optimal for viewing.

Meteors appear to radiate from the vicinity of Betelgeuse, the red supergiant marking Orion’s shoulder, hence the shower’s name. Observers need not stare directly at the radiant; meteors seen farther from this point often produce longer, more dramatic trails across the sky — each one a tiny piece of Halley’s Comet completing a journey centuries in the making.

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