The Alpha Capricornids and Southern Delta Aquariids meteor showers peak simultaneously Thursday night into Friday, though a full moon will significantly hinder visibility of fainter streaks, according to the American Meteor Society. While these annual events offer a glimpse into cosmic debris, the reflected moonlight creates a “washout” effect that makes many meteors difficult to see.
Moonlight Interference and Viewing Challenges
A full moon typically limits the visibility of meteor shower peaks roughly every three years, according to Bob Lunsford, report coordinator for the American Meteor Society. Because the July full moon remains in the sky throughout the night, observers cannot wait for the moon to set to find a dark window for viewing.
Bill Cooke, lead of NASA’s Meteoroid Environment Office, stated that the meteors will be “very difficult to see” because of this constant lunar light. To mitigate the glare, Lunsford suggests observers find a high elevation and face northward with the moon at their back to protect their night vision from direct moonlight.
Pro Tip: To maximize your chances of spotting a meteor during a full moon, move away from city lights and give your eyes at least 20 minutes to adjust to the darkness.
Comparing the Alpha Capricornids and Southern Delta Aquariids
Though they peak at the same time, these two showers differ in speed, brightness, and origin. The Southern Delta Aquariids radiate from the Aquarius constellation and are characterized by faster-moving meteors. The Alpha Capricornids radiate from the Capricornus constellation and are generally brighter, making them easier to spot despite the moonlight.
| Shower | Radiant Point | Characteristic | Hourly Rate (North) |
|---|---|---|---|
| Southern Delta Aquariids | Aquarius | Fast-moving | ~2 per hour |
| Alpha Capricornids | Capricornus | Brighter | ~3 per hour |
Regional Advantages for Southern Hemisphere Observers
Observers in the Southern Hemisphere have a distinct advantage during this double peak. According to Bill Cooke of NASA, the radiant—the point where meteors appear to originate—sits higher in the sky for those in the south than for those in the Northern Hemisphere.
This positioning increases the likelihood of sightings. For the Southern Delta Aquariids, the rate increases to approximately three meteors per hour for Southern Hemisphere viewers, compared to two per hour in the north, the American Meteor Society reports.
Did you know? Meteor showers aren’t just for hobbyists. NASA uses this data to understand what spacecraft and crews might encounter in space to ensure the safety of human spaceflight.
Upcoming 2026 Meteor Calendar
While the current double peak faces lunar interference, the Perseids—already active this week—will peak in mid-August. EarthSky reports that the Perseids are expected to produce a more spectacular display under clearer skies.
According to the American Meteor Society, the following peaks are expected in 2026:
- Perseids: August 12-13
- Orionids: October 21-22
- Southern Taurids: November 4-5
- Northern Taurids: November 11-12
- Leonids: November 16-17
- Geminids: December 13-14
- Ursids: December 21-22
Frequently Asked Questions
Why does a full moon make meteors harder to see?
The reflected light from the moon brightens the night sky, which masks the faint light produced by smaller or slower meteors.
What is a “radiant” in a meteor shower?
The radiant is the specific point in the sky from which the meteors appear to originate, usually associated with a specific constellation.
Which meteor shower is generally the brightest?
Between the current pair, the Alpha Capricornids are known for brighter meteors that are easier to spot.
Join the conversation: Have you managed to spot any streaks in the sky tonight? Tell us your location and what you saw in the comments below, or subscribe to our newsletter for alerts on the next major celestial event.
Worth a look