The Orionids are a meteor shower that occurs annually, peaking around mid-October. They are named after the constellation Orion, from which they appear to originate. The shower is caused by the Earth passing through the debris left by the comet Halley's Comet, which orbits the Sun approximately every 76 years. During the peak, observers can see about 20 meteors per hour under ideal conditions. The meteors are known for their bright trails and can sometimes produce fireballs, which are exceptionally bright meteors. The best time to view the Orionids is usually after midnight until dawn.