Leonid Meteor Shower 2025 Peak Dates and Expected Rates
The Leonid meteor shower is active each year from around November 6 to 30, with the peak typically occurring near November 17 or 18. In 2025, the peak is expected around November 17, with the waxing crescent moon setting early and leaving dark skies favorable for viewing. The shower originates from debris left by comet 55P/Tempel-Tuttle, which orbits the Sun roughly every 33 years. Historical Leonid storms have produced hundreds of meteors per hour during exceptional returns, but typical annual rates are lower. For 2025, observers can expect normal to moderate activity, with Zenithal Hourly Rates around 15 under ideal conditions. Detailed orbital data and predictions are maintained by the American Meteor Society and the International Meteor Organization American Meteor Society.
Peak viewing is usually best in the hours between local midnight and dawn, when the Leonid radiant in the constellation Leo climbs higher in the sky. The Leonid radiant rises in the east-northeast after midnight and reaches a favorable altitude before dawn, increasing the number of meteors seen. Observers in the Northern Hemisphere generally see more meteors because the radiant is higher in the sky during peak hours. In the Southern Hemisphere, the radiant appears lower, which can reduce the number of visible meteors. The best conditions include a clear, transparent atmosphere, low humidity, and minimal light pollution. Light pollution maps and dark sky locations can be checked through resources such as Dark Site Finder Dark Site Finder.
Optimal Equipment, Locations, and Techniques for Leonid Viewing
No special equipment is required for Leonid meteor shower viewing; the meteors are bright enough to be seen with the naked eye. A reclining chair or blanket, warm clothing, and a red flashlight help maximize comfort and night vision adaptation. Wide-field viewing is recommended, as Leonid meteors can appear anywhere in the sky even though their trails point back toward the radiant in Leo. Experienced observers often choose open fields, hilltops, or designated dark sky parks away from urban centers. Apps and websites such as Stellarium Stellarium can show the radiant position and local meteor timing for any location.
Photographers and amateur astronomers can capture Leonid meteors using a camera with manual settings, a sturdy tripod, and a wide-angle lens. Recommended settings include a high ISO, wide aperture, and exposures of 10 to 30 seconds to capture faint streaks. Long-exposure stacking software can later combine multiple frames to reveal fainter meteors. Some observers use all-sky cameras or meteor patrol systems for continuous monitoring. Professional meteor monitoring networks, including the NASA All Sky Fireball Network, provide data on bright meteors and orbital trajectories NASA All Sky Fireball Network.
Historical Storms, Scientific Data, and Public Outreach for the Leonids
The Leonids are famous for periodic storms, with notable returns in 1833, 1866, 1966, 1999, 2001, and 2002. During the 1966 storm, observers reported rates exceeding 100,000 meteors per hour under ideal conditions. These storms occur when Earth passes near dense filaments of debris left by comet 55P/Tempel-Tuttle during its perihelion passages. The next perihelion of Tempel-Tuttle is expected in 2031,