Total solar eclipse of August 21, 2017

Total eclipse

Key facts

Date
August 21, 2017
Type
Total eclipse
Duration of totality at eclipse maximum
2 min 40 s
Global eclipse maximum
at 18:26 UTC UTC (Coordinated Universal Time): the worldwide time standard, independent of local time zones and daylight saving time.
Coordinates of greatest eclipse
37.0° N – 87.7° W
Path width at maximum
about 115 km
Saros series Number of the Saros series to which the eclipse belongs: similar eclipses recur about every 18 years and 11 days, with a comparable type and path, though not over the same locations each time.
145
Visibility map — Total eclipse on August 21, 2017

Choose a location anywhere on Earth to see if the eclipse will be visible, check local times, and watch it unfold in an animation.

Explore the eclipse

The path of totality crosses the United States. Within it, the Moon completely covers the Sun for about 2 minutes 40 seconds at maximum. A partial solar eclipse extends into Canada, Mexico, Central America, and the Caribbean.

Path of totality

Regions
United States
Example destinations
United States
Example locations
NashvilleCasperMadras, Oregon

To look at the Sun: eclipse glasses, except during totality at your location.

NashvilleUnited States

View the eclipse
Key moment Local time Obscuration Comment
Partial — start
Mon, Aug 21
The Moon starts covering the Sun
Start of totality
Mon, Aug 21
The solar disc is completely covered by the Moon
Maximum
Mon, Aug 21
Maximum obscuration
End of totality
Mon, Aug 21
The Sun reappears — eclipse glasses required
Partial — end
Mon, Aug 21
The Moon no longer covers the Sun

CasperUnited States

View the eclipse
Key moment Local time Obscuration Comment
Partial — start
Mon, Aug 21
The Moon starts covering the Sun
Start of totality
Mon, Aug 21
The solar disc is completely covered by the Moon
Maximum
Mon, Aug 21
Maximum obscuration
End of totality
Mon, Aug 21
The Sun reappears — eclipse glasses required
Partial — end
Mon, Aug 21
The Moon no longer covers the Sun

Madras, OregonUnited States

View the eclipse
Key moment Local time Obscuration Comment
Partial — start
Mon, Aug 21
The Moon starts covering the Sun
Start of totality
Mon, Aug 21
The solar disc is completely covered by the Moon
Maximum
Mon, Aug 21
Maximum obscuration
End of totality
Mon, Aug 21
The Sun reappears — eclipse glasses required
Partial — end
Mon, Aug 21
The Moon no longer covers the Sun

Areas with a partial eclipse

Regions
Canada, Mexico, Cuba, Bahamas, Belize
Example destinations
CanadaMexicoCubaBahamasBelizeAzores
Example locations
VancouverTijuanaHavanaNassauBelize CityPonta Delgada

To look at the Sun: eclipse glasses for the whole eclipse.

VancouverCanada

View the eclipse
Key moment Local time Obscuration Comment
Partial — start
Mon, Aug 21
The Moon starts covering the Sun
Maximum
Mon, Aug 21
Maximum obscuration
Partial — end
Mon, Aug 21
The Moon no longer covers the Sun

TijuanaMexico

View the eclipse
Key moment Local time Obscuration Comment
Partial — start
Mon, Aug 21
The Moon starts covering the Sun
Maximum
Mon, Aug 21
Maximum obscuration
Partial — end
Mon, Aug 21
The Moon no longer covers the Sun

HavanaCuba

View the eclipse
Key moment Local time Obscuration Comment
Partial — start
Mon, Aug 21
The Moon starts covering the Sun
Maximum
Mon, Aug 21
Maximum obscuration
Partial — end
Mon, Aug 21
The Moon no longer covers the Sun

NassauBahamas

View the eclipse
Key moment Local time Obscuration Comment
Partial — start
Mon, Aug 21
The Moon starts covering the Sun
Maximum
Mon, Aug 21
Maximum obscuration
Partial — end
Mon, Aug 21
The Moon no longer covers the Sun

Belize CityBelize

View the eclipse
Key moment Local time Obscuration Comment
Partial — start
Mon, Aug 21
The Moon starts covering the Sun
Maximum
Mon, Aug 21
Maximum obscuration
Partial — end
Mon, Aug 21
The Moon no longer covers the Sun

Ponta DelgadaAzores

View the eclipse
Key moment Local time Obscuration Comment
Partial — start
Mon, Aug 21
The Moon starts covering the Sun
Maximum
Mon, Aug 21
Maximum obscuration
Partial — end
Mon, Aug 21
The Moon no longer covers the Sun
Sunset
Mon, Aug 21
Sun’s centre on the horizon

Watch a solar eclipse safely

To look directly at the Sun, use eclipse glasses that conform to ISO 12312-2 and are in good condition. Ordinary sunglasses do not provide enough protection.

You may look at the Sun without glasses only during totality at your observing location, when its disc is completely covered by the Moon. Put them back on as soon as the Sun begins to reappear. During a partial or annular eclipse, eclipse glasses remain necessary for any direct viewing.

Do not use binoculars, a telescope, a camera, or any other optical instrument unless it is fitted with a suitable solar filter placed in front of the optics. Eclipse glasses are not sufficient in this case.

The information and times shown are provided for guidance only. Each observer must check local conditions and follow the applicable safety guidelines.

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Calculations and simulation based on the Besselian elements of Fred Espenak (NASA/GSFC)

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