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← Penumbral lunar eclipse on August 17, 2027

Mon, Aug 16

Penumbral lunar eclipse on August 17, 2027 from Thornton, CO

Whole eclipse.

in 289 days 13 h

Times are local (MDT).

"Worth looking up" alerts for Thornton, CO

One notification in the late afternoon, only on nights with something worth going out for over Thornton, CO: a very bright ISS pass, a Starlink train, a meteor shower peak, planets together, a supermoon or eclipse, or a bright comet. Only the city is stored, not your location.

Put Thornton, CO's sky in your calendar

Full moons, meteor showers, eclipses and bright ISS passes (with a 10-minute reminder) appear in your calendar and update by themselves.

Plan your night

☁️ Clouds through the night

The hour-by-hour cloud forecast appears about five days before.

🌑 Find a dark sky

City light hides most of the show. Drive until the sky looks clearly darker (often 30–60 minutes out), away from streetlights, with an open view.

🛰️ Also crossing the sky that night

Bright ISS and Starlink passes during the best hours appear about five days before.

The Moon dims slightly in Earth's outer shadow: easy to miss.

How to watch

  • No equipment needed, and it is safe to look at.
  • The Moon must be above your horizon: check the table for your city.
  • Binoculars show the red color of totality best.
Tonight's sky over Thornton, CO →

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Calculated with Astronomy Engine (MIT license).