The coming week’s menu features a meteoric tossed salad of Taurid fireballs crossing paths with the annual Orionid meteor shower. While the Taurids are a broad, sparse stream coming in dribs and drabs throughout October and November, the Orionids peak on the mornings of October 21-22. Expect to see 20 meteors an hour emanating from a point of sky above the bright star Betelgeuse in the hunter’s shoulder.
Each streak of light you see signals the incineration of a flake of Halley’s Comet, the parent comet of the Orionids. Every year in late October, Earth cuts across Halley’s orbit and bits of dust shed by the comet from previous passes near the sun burn up as they strike the upper atmosphere at speeds of around 148,000 mph.
It’s been a couple years since I’ve seen the shower due to clouds or moonlight, but to the patient observer they’re thrilling to watch. Orionids are extremely fast – most tear across the sky in a second or less. Don’t even bother to alert your observing companions if you see one. It’ll be long gone even as the words leave your mouth, though if you’re lucky, some meteors will leave glowing trails of ionized air or even a curl of cosmic smoke (dust) in their wakes.
“The Orionid meteor shower is not the strongest, but it is one of the most beautiful showers of the year,” says Bill Cooke, head of NASA’s Meteoroid Environment Office.
This year’s shower won’t be compromised by moonlight either. It may even be enhanced by it. On Tuesday morning, a fingernail crescent will attempt to steal the show as it rises in the east at the start of morning twilight. Which brings us to the best time to view the Orionids.
I’ve drawn the map above for 2 a.m. local time. That’s when the radiant is high enough in the sky for a good show to begin, but the hours just before dawn are a tad better as the radiant point is higher yet. The ideal time would be from 3-6 a.m. Find a place where light pollution is at a minimum and set up facing south-southeast for the best view. A comfy reclining chair and blanket or sleeping bag will help you stay relaxed and warm. It is almost November after all!