Southern delta-Aquariids from Saint Petersburg in 2026

Southern delta-Aquariids from Saint Petersburg: the short answer

From Saint Petersburg, St.-Petersburg (59.9°N, 11 m) the Southern delta-Aquariids maximum of 16:23 on 31 July 2026 is not worth a broken night. The radiant culminates at 14.2° at 03:07, and on the reference rural sky that converts to 0.1 meteors an hour at best.

That ranks it 11th of twelve from Saint Petersburg this year, behind the Geminids (132.7/h) and the Quadrantids (52.3/h).

The radiant track over this city

The radiant rises at 23:05 bearing ESE, culminates 14.2° up at 03:07 towards south (180°), and sets at 07:09. It lies inside Aquarius. The rate scales with the sine of that altitude, so 14.2° buys you 24% of a zenith radiant.

When it gets dark here

Saint Petersburg gets no astronomical darkness on this date: sunset 21:31, sunrise 04:39, 7 h 8 min of night, and the Sun never drops the full 18° below the horizon in between. At 59.9°N that is a seasonal fact, not a local one, and it costs you the faintest meteors all night.

Local solar midnight, the true middle of the night, falls at 01:05 here rather than at 00:00: Europe/Moscow runs 59 minutes ahead of mean solar time at 30.31°E. 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 Saint Petersburg. The Moon is 95% lit and only 0 of 5 sampled hours are moon-free. Moonrise 21:53. Moonset 08:06. At the best hour it stands 16.7° above the horizon, 7° from the radiant, pulling the limiting magnitude down to 2.96.

Why 0 an hour and not 25

Zenithal hourly rate 25, population index 3.2, entry speed 40.6 km/s — fast. Those are stream constants. What changes from city to city is the geometry: at 14.2° of radiant altitude and limiting magnitude 2.96, Saint Petersburg converts that ZHR into about 0.1 meteors an hour.

Hour by hour the modelled rate runs from 0.0 at 23:00 (radiant -0.5°) to 0.0 at 03:00 (radiant 14.2°), peaking at 0.1. That spread across 5 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 Saint Petersburg rather than the only one.

Watching from around Saint Petersburg

Saint Petersburg, St.-Petersburg is the 52nd largest of the 300 cities covered here, with a population of 5.35 million at 11 m above sea level. The nearest other cities on the site are Moscow (635 km SE), Stockholm (691 km W), Minsk (692 km SSW) — close enough that the radiant altitudes barely change, far enough that sunset and moonrise do.

What this page does not know

Light-pollution data for this location is not connected yet. Rates on this page are computed against the reference rural sky the zenithal hourly rate is defined for (naked-eye limiting magnitude 6.5); they are not a claim about how bright the sky is where you are standing. Once the light-pollution layer is connected these figures will be recomputed for the local sky and will generally fall.

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.