The Leonid meteor shower reaches its peak of activity in the early hours of this Sunday (16) to Monday (November 17, 2025). The phenomenon, caused by Earth’s passage through the trail of debris from comet 55P/Tempel-Tuttle, will be visible across the planet. The expected rate varies between 3 and 15 meteors per hour in dark sky locations.
The best time for observation occurs in the hours before dawn, when the rain radiant, in the constellation Leo, is highest in the sky. The Moon in its waning phase, with only 9% illumination, reduces light interference and improves visibility conditions.
The Leonid meteors stand out for their high speed, reaching 71 kilometers per second, which produces bright and fast trails.
Characteristics of the Leonid meteors
The fragments of comet Tempel-Tuttle enter the Earth’s atmosphere at high speed. This characteristic generates intense flashes and, in some cases, bolides – brighter explosions than normal.
Many meteors have a greenish or bluish color. Contrails can last several seconds, especially so-called earthgrazers, which cross the sky close to the horizon.
Conobservation conditions in 2025
The current lunar phase favors visibility in almost the entire Brazilian territory. The North and Northeast regions have a greater probability of clear skies at this time of year.
Inland cities and rural areas offer better results due to less light pollution. Capitals such as São Paulo, Rio de Janeiro and Belo Horizonte require traveling to more distant locations.
Observation does not require special equipment. Binoculars or telescopes are not recommended as they limit the field of view needed to track fast meteors.
Best times and positions
The Leonidas radiant is located in the constellation Leo, which rises on the eastern horizon at around 11pm. Activity increases progressively until dawn.
The recommendation is to lie down with your feet facing east and your gaze directed towards the zenith. The eyes need 20 to 30 minutes to fully adapt to the darkness.
Practical Observation Tips
- Choose elevated locations away from artificial light sources
- Take a reclining chair or mat for greater comfort
- Wear appropriate clothing for the early morning temperature
- Avoid looking at cell phone screens during observation
- Keep patience as the meteorappear at irregular intervals
Current activity and future predictions
Leônidas has remained active since November 6th and continues until November 30th. There is no meteoritic storm forecast in 2025, unlike what occurred in years such as 1833, 1866 and 2002.
Comet Tempel-Tuttle’s next significant approach will occur around 2031. Until then, the annual rate should remain in the range of 10 to 20 meteors per hour under ideal conditions.
Other meteor showers close the 2025 calendar, including the Geminids in December.
