Summer Meteor Showers: Alpha Capricornids & Delta Aquariids Viewing Guide
Southern Delta aquariids and Alpha Capricornids: Your Guide to July’s Meteor Shower Spectacle
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get ready for a celestial show! July is set to dazzle stargazers with two important meteor showers: the Southern Delta Aquariids and the Alpha Capricornids. While the Southern Delta Aquariids are best enjoyed from the Southern Hemisphere, both showers offer a chance to witness the magic of “shooting stars” from most locations.
Understanding the Southern Delta Aquariids
As their name suggests, the Southern Delta Aquariids are most prominently viewed from the Southern Hemisphere. This is due to their radiant point – the apparent origin of the meteors – being the constellation Aquarius. From the Northern Hemisphere, Aquarius sits low on the southern horizon, making it a less ideal viewing spot.
Aquarius rises due south and reaches its highest point in the sky during the predawn hours of July. This timing makes the predawn hours of July the prime time for observers to catch the most meteors from this shower.
What Causes Meteor Showers?
“Shooting stars,” or meteors, are the streaks of light we see when small pieces of space debris, known as meteoroids, enter Earth’s atmosphere. These meteoroids originate from asteroids or comets. As thay hurtle through our atmosphere at incredible speeds, friction causes them to heat up and burn, creating the luminous trails we observe.
The Southern Delta Aquariids are caused by the comet 96P/Machholz. This comet, discovered in 1986, is approximately 3.7 miles (6 kilometers) wide and completes an orbit around the sun every 5.3 years. As Earth passes through the debris trail left behind by this comet, we experience the annual meteor shower.
The Alpha Capricornids: A Brighter, Slower Display
Adding to the celestial excitement, the Alpha Capricornids will also peak overnight on July 29-30, contributing an estimated five to ten meteors per hour to the night sky.This shower is active from July 7 to August 15, with its radiant point located in the constellation Capricornus, which is conveniently situated next to Aquarius in the night sky.
While the proximity of their radiant points might make it challenging to distinguish between meteors from the two showers, the Alpha Capricornids are known for their distinct characteristics: they tend to be particularly radiant, slow-moving, and often display vibrant colors.These captivating meteors are the remnants of Comet 169P/NEAT, a 2-mile-wide (3.2 km) comet discovered in 2002 that orbits the sun every 4.2 years.
Tips for Optimal Viewing
For the best experience, observers in the Southern Hemisphere are in for a treat with optimal viewing conditions. Though, even those in the Northern Hemisphere can increase their chances of success. By looking generally south in the predawn hours on July 30, you’ll be positioning yourself to catch the most meteors from both the Southern Delta aquariids and the Alpha Capricornids.
Remember to find a location away from city lights for the darkest skies, allow your eyes to adjust to the darkness for at least 20 minutes, and lie back comfortably to take in the full expanse of the night sky. Happy stargazing!