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  • Smokey Jack Observatory 100 South Adams Boulevard Westcliffe, CO, 81252 United States (map)

Cancelled due to weather

THE 2019 TRANSIT OF MERCURY: On Monday morning, November 11, Mercury will pass directly in front the Sun. The rare transit begins at 7:35 a.m. EST and lasts for almost six hours. However, for the Mountain Time Zone, the transit will be in progress at sunrise. Plus for the SJO’s location, the Wet Mountains to its east delay sunrise about 30 minutes. The Sun with Mercury already transiting will become accessible at the SJO location about 8:30 a.m. Mercury will continue its slow progress across the Sun’s disk until it passes off the disk approximately 11:04 a.m. MST. This is a special event that won't happen again until 2032.
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Simulation of Mercury transiting the Sun’s disk on November 11, 2019.

Simulation of Mercury transiting the Sun’s disk on November 11, 2019.


  • DON'T ever look at the Sun without proper eye protection.

  • DON'T view the Sun through sunglasses of any type (single or multiple pairs), or filters made from photographic film, or any combination of photographic filters, crossed polarisers or gelatin filters, CDs, CD-ROMs, or smoked glass. None of these are safe.

  • DO view the Sun ONLY through special filters made specifically for safe solar viewing.

There is no backup date as this is a natural event that cannot be duplicated.

Depending on weather conditions, Star Parties can be cancelled the day of the event. All cancellations will be made by 7:00 a.m. the day of the event and our voice mail greeting will be changed to announce the cancellation. In order to obtain cancellation details you can call our phone number, 719-398-1284. We will also try to update the Custer County Community Bulletin Board page with cancellation details as well. However, the voicemail greeting is the primary source of up to date information.

All Dark Skies’ events are free and open to the public.