The September Epsilon Perseids meteor shower will reach its peak on September 9, 2025, giving skywatchers in Hainan a chance, though a slim one, to spot a few fast-moving meteors. With bright moonlight dominating the night sky, the conditions this year are far from ideal, but the shower remains a regular feature of the September sky.
A Lesser-Known Meteor Shower
The September Epsilon Perseids is a minor annual meteor shower that runs from September 5–21, peaking around the 9th or 10th. The meteors appear to radiate from the constellation Perseus, near the star Epsilon Persei, and they enter the atmosphere at about 64 kilometres per second.
On average, the shower produces only around five meteors per hour in dark conditions. By comparison, August’s Perseids can bring up to 100 meteors per hour. There have been occasional exceptions, 2008 and 2013 saw brief outbursts of up to 30 meteors per hour, but such events are rare.
Astronomers believe the shower comes from an as-yet unidentified long-period comet, though its exact origin remains uncertain.
Bright Moonlight Hampers Viewing
In 2025, the peak arrived just two days after the full Moon. With the Moon still 97% illuminated, its glare will wash out most of the more faint meteors. Even under the best conditions, experts estimated a maximum of seven meteors per hour before dawn, with lower rates in towns and cities where light pollution adds to the challenge.
Viewing From Hainan
Hainan’s location at 20°N latitude makes it well positioned to see the shower. The radiant point in Perseus rises in the northeast around 10:00–11:00 PM, climbing higher toward dawn. However, September in Hainan also means humid nights, frequent rain, and the possibility of thunderstorms, further reducing opportunities for clear skies.
Those who do venture out are advised to:
Look for dark, open areas away from city lights.
Use trees, buildings, or hills to block the Moon’s glare.
Allow at least 30 minutes for eyes to adjust to the dark.
Face northeast once Perseus is above the horizon.
The shower remains active until September 21, giving observers a chance to catch a stray meteor as the Moon wanes.
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