Southern delta-Aquariids from Santiago in 2026

Southern delta-Aquariids from Santiago: the short answer

Marginal from Santiago. Maximum 09:23 on 31 July 2026; the radiant reaches 72.6° at 02:51 and the rate for this city's measured sky tops out at 0.3 an hour with the Moon 98% lit.

That ranks it 8th of twelve from Santiago this year, behind the Geminids (5.6/h) and the Orionids (1.3/h).

The radiant track over this city

Aquarius carries the radiant. From Santiago it clears the horizon at 20:07 on a bearing of 109° (ESE), reaches 72.6° at 02:51 in the north, and drops back below the horizon at 09:34. Within the observing window it peaks at 72.5°.

When it gets dark here

Santiago loses the Sun at 18:02 and gets it back at 07:35. True astronomical darkness — the only part that counts for faint meteors — runs 19:28 to 06:09, 10 h 41 min out of 13 h 32 min of night.

Local solar midnight, the true middle of the night, falls at 00:49 here rather than at 00:00: America/Santiago runs 43 minutes ahead of mean solar time at 70.65°W. That offset is why the best hour on this page is not the hour you would guess from the clock.

What the Moon does here

Moonlight is the limiting factor on this night from Santiago. The Moon is 98% lit and only 1 of 13 sampled hours are moon-free. Moonrise 19:13. Moonset 08:45. At the best hour it stands 32.9° above the horizon, 11° from the radiant, pulling the limiting magnitude down to 2.95.

Why 0 an hour and not 25

Converting ZHR 25 into something useful for Santiago means multiplying by sin(72.5°) and dividing by 3.2 raised to (6.5 − 2.95). That lands at 0.3 meteors an hour, from fast 40.6 km/s entries.

Hour by hour the modelled rate runs from 0.0 at 19:00 (radiant -12.8°) to 0.0 at 07:00 (radiant 31.7°), peaking at 0.3. That spread across 13 hours is why a "what time" answer beats a "how many" answer.

The stream comes from Comet 96P/Machholz and is listed as active 12 July to 23 August, so 31 July 2026 is the best night from Santiago rather than the only one.

Watching from around Santiago

Santiago is the 59th largest of the 300 cities covered here, with a population of 4.84 million at 556 m above sea level. The nearest other cities on the site are Córdoba (648 km ENE), Buenos Aires (1137 km E), Asunción (1551 km ENE) — close enough that the radiant altitudes barely change, far enough that sunset and moonrise do.

What this page does not know

Rates on this page are computed against this city's own measured sky brightness, derived from satellite night-lights data. That is a calculated brightness for the point directly overhead, not a survey of your street: a park on the edge of town and a lit car park in the centre share the same figure here and will not look the same. It is also zenith-only, while the Bortle scale describes the whole sky from horizon to horizon.

Cloud cover is a forecast, not a constant, so it is resolved when you load the tonight card and is deliberately absent from this prerendered page — the hourly table shows "unavailable" rather than assuming clear skies. Meteor outbursts, local terrain and building horizons are not modelled.

A single observer with an unobstructed horizon typically records 30–50% below the ideal-sky figure. Give your eyes twenty minutes to adapt, keep bright screens away, look about halfway up the sky rather than straight at the radiant, and count for a full hour before judging a shower.