The 2 August 2027 eclipse, town by town

How long totality lasts, and at what time on the local clock, for 14 towns along the path. Every figure is computed for that town's own coordinates with the same engine, so they are directly comparable.

The headline: Sohag, Egypt gets 6 min 26 sec, the longest on this list. The NASA eclipse canon puts the longest totality available anywhere on this eclipse at 6 min 23 sec, at latitude 26.81 north, longitude 31.13 east, in the Western Desert west of the Nile; the durations below are computed with different adopted radii and run a few seconds longer, which the note on conventions explains. Nothing on easily accessible land this century beats it. The main page for this eclipse has the global circumstances and the shape of the path.

Inside the path of totality

Sorted by how long the Sun is completely covered. Local time is the town's own clock time at maximum eclipse.

Standing somewhere specific? Your Eclipse Day computes the whole morning to the second for your exact coordinates: a printable plan, a pocket field card and a calendar file with alarms.

Close, but outside the path

These towns see a deep partial eclipse and no totality at all. The difference is not a matter of degree: without totality there is no corona, the sky does not go dark, and filters never come off. If you are travelling for this eclipse, being in one of these towns on the day is the one mistake worth real effort to avoid.

En español: las ciudades españolas de esta franja tienen su página en castellano: Tarifa, Ceuta, Cádiz, Málaga.

Anywhere else

This list is a sample of the path, not all of it. For any other location, including a specific hotel or a spot out on the center line, the Eclipse Explorer computes contact times and obscuration for coordinates you give it. Place names and coordinates here come from GeoNames (geonames.org), CC BY 4.0.

How these were computed

Contact times come from the open-source Astronomy Engine, the same one behind every other page on this site and the public API, run at each town's GeoNames coordinates at sea level. Durations are quoted to the second because the computation is deterministic, not because a second is meaningful to a person standing there: move a few kilometres toward the center line and it changes. The methodology page covers the conventions, and the numbers themselves are public-domain facts you may reuse freely.

Two things to know about every duration on this page. Greatest eclipse is the moment the axis of the Moon's shadow passes closest to Earth's center; greatest duration is where totality lasts longest, and the two fall at different places. The NASA eclipse canon puts greatest duration at 6 min 23.2 sec and greatest eclipse a little southeast of it at 6 min 22.6 sec.

And the figures on this page run longer than the canon's, by about three seconds. The engine here adopts the IAU nominal solar and lunar radii; the canon adopts a smaller lunar radius for totality, chosen because the Moon's real limb valleys shorten what an observer actually sees. Treat every duration below as an upper bound of a few seconds.

One more convention worth stating: these are mean-limb figures. The Moon's edge is mountainous, and a limb-corrected calculation shifts the second and third contact instants by a second or two either way depending on which valley the last sliver of Sun drains through. That correction is beyond what this page computes, and it is smaller than the difference a short drive makes.