Why this little-known meteor shower is one to watch this week

Tracking the Aurigids and Long-Period Comet Kiess

Earth’s journey through the solar system routinely intersects with trails of dust and rocky particles left behind by passing comets and asteroids. When these remnants enter the atmosphere at high speeds, they ignite to create brief streaks of light known as meteors. Among the active showers crossing Earth’s path, the Aurigids remain active until September 5, with activity peaking overnight between August 31 and September 1, as reported by SBS.

Unlike major annual displays like the Perseids or Orionids, the Aurigids are a relatively minor shower with an expected peak rate of roughly six meteors per hour under ideal conditions. The shower traces its origins to comet C/1911 N1, also known as Kiess, a long-period comet discovered in 1911 by astronomer Carl Clarence Kiess. While short-period comets typically complete their orbits in fewer than 200 years and originate in the Kuiper belt, Kiess requires an estimated 2,000 years for a single solar orbit and is now billions of kilometers away.

“You can think of it as dirty snowballs.”

Andrew Tomkins, professor at the School of Earth, Atmosphere and Environment at Monash University

Tomkins noted that long-period comets originate far beyond the planets in the distant Oort Cloud, which he described as a giant spherical shell of objects so remote that spacecraft like the Voyager missions have not traversed it, with scientists inferring its presence through cometary behavior.

Extreme Velocity and Southern Hemisphere Viewing Challenges

What sets the Aurigids apart from other minor showers is not their frequency, but their velocity. While typical meteors from short-period comets travel at approximately 15 kilometers per second, Aurigid meteors slam into the atmosphere at immense speeds.

To put that velocity into perspective, Tomkins explained that it is comparable to a meteor moving between Melbourne and Geelong in a second. That speed makes them considerably faster than space junk, such as rocket debris, which typically travels at about 8 kilometers per second.

Despite their speed, viewing the Aurigids from Australia presents significant obstacles. The shower is best suited for observers in the Northern Hemisphere, where the radiant point rises higher in the sky. In Australia, particularly across southern regions, the radiant does not clear the horizon until roughly 3 a.m. AEST, leaving only a narrow window before sunrise. Furthermore, moonlight during the peak threatens to wash out fainter streaks, prompting experts to recommend finding dark sky sites well away from urban light pollution.

Broader Celestial Activity Across the Skies

The Aurigids are part of a broader seasonal shift in meteor activity. The September Epsilon Perseids become active around the same time, while the Orionid meteor shower provides a more substantial viewing opportunity in October, followed by the Leonids in November and the Geminids in December, according to reporting from SBS.

Earlier in the season, skywatchers observed other celestial phenomena, including a bright fireball reported across multiple states by the American Meteor Society. That sporadic fireball appeared 57 miles above Paw Paw, Maryland, traveling northwest at 62,000 miles per hour before disintegrating 24 miles above Point Marion, Pennsylvania, reaching a peak brightness roughly 10 times that of Venus, Fox Weather noted.