Cool Moon Facts by Whip

Real astronomy and dated history, with sources. Documented traditions and folklore. Modern lunar astrology · symbolic, not predictive.

Peaks 30–31 July ZHR 25

The Southern Delta Aquariids

A steady southern shower that overlaps the start of the Perseids.

Broad rather than sharp: the rate climbs for a week either side, so the exact date matters less here than almost anywhere else on this page. Best seen from the southern hemisphere, where the radiant actually gets overhead.

Peak
30–31 July, most years
Zenithal hourly rate
25
Radiant
Aquarius
Debris from
comet 96P/Machholz, on the current best guess

Where you can see it

The radiant rises everywhere south of 74°N. From mid-northern latitudes (40°N) it climbs to about 34°. From mid-southern latitudes (35°S) it climbs to about 71°.

The height is the radiant's, the point the meteors seem to come from, on the peak night, counting only the hours when the Sun is at least 12° below the horizon. The lower it is, the fewer meteors reach you: at 30° up you would see about half the rate above, before the Moon and your own sky take their share.

The Moon at each of the next four peaks

The Moon's phase at the Southern Delta Aquariids maximum, 2026 to 2029
MaximumMoonWhat that means
31 July 2026Waning Gibbous, 98%A bright Moon through the pre-dawn hours, which is exactly when the rate peaks.
31 July 2027Waning Crescent, 9%With effectively no Moon tonight, this is as good as the Perseids gets.
31 July 2028Waxing Gibbous, 74%A bright Moon up for most of the night. Expect the brightest meteors only.
31 July 2029Waning Gibbous, 73%A bright Moon through the pre-dawn hours, which is exactly when the rate peaks.

The Moon is taken at 00:00 UTC on the morning of maximum. Whether it is actually above your horizon at three in the morning depends on where you are standing — the live calendar works that out for your own location. Showers are almost all better after midnight, when your side of the planet turns to face the direction of travel and starts sweeping meteors up instead of waiting to be caught.

What you need

Nothing. Meteors cross too much sky too fast for binoculars or a telescope to be anything but a handicap — the equipment for this is a coat, a chair that tips back, and twenty minutes for your eyes to adapt. Look up and slightly away from the radiant rather than straight at it; meteors near the radiant are coming at you end-on and leave the shortest trails.

Peak night and rate: International Meteor Organization, Meteor Shower Calendar (opens in a new tab). Moon phases computed here.

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