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Sierra Vista's Best Kept Secret!

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Solar Saturdays


Join us to view the Sun  every second Saturday of the month (Except July and August) from 9 am until 11 am at the observatory.  Admission is free.  Members of the Huachuca Astronomy Club will  show you sunspots, solar prominences and other solar features through safe solar telescopes.  Solar Saturdays are weather dependent and will be canceled if the sky is cloudy.

Come out and view our star!

Check the recording at (520) 626 6649 to check for cancellation in the event of cloudy weather.

PLEASE NOTE: The October 2023 Solar Saturday will be held at Kartchner Caverns State Park beginning at 8:00 a.m. Oct 14 to view the partial solar eclipse. There will not be an event at the Patterson Observatory.

The James Webb Space Telescope, which launched on Christmas Day 2021, achieved its final operational configuration on January 8, 2022, when the observatory was still about two weeks travel time from its halo station orbit at the L2 Lagrange point about a million miles from Earth. Webb began its multi-year science mission after about six months of calibration and alignment in July of 2022.  Webb is designed to see back in time to the birth of the first stars and galaxies, study the formation and evolution of galaxies, understand the formation of stars and planetary systems, and study planetary systems and the origins of life.


See the video section below to take a virtual tour of the Patterson Observatory. The interactive website lets you roam the building at your leisure. Many interesting displays are highlighted and detailed in this amazing high resolution photogrammetric capture of the facility. If you can’t make it in person, this is the next best thing!

The University South Foundation, Inc. owns and maintains the Patterson Observatory located on University of Arizona Sierra Vista Campus. The Huachuca Astronomy Club (HAC) volunteers operates the observatory and hosts Public Viewing Nights.

These "Public Nights" are free and family friendly and start about a half hour after sunset. They are weather dependent (canceled during inclement weather) and are not scheduled during the monsoon months of July and  August. Space is limited and guests must register.  See the form below. The observatory is also available, by appointment, to serve youth, school and community organizations.

The Patterson Observatory is  a NASA Space Place and a member of the NASA Night Sky Network. It has a 16 foot dome, housing a Ritchey-Chretien  telescope of 20” aperture. This telescope, with its sophisticated detectors, is capable of observing objects one  million times fainter that the human eye can detect.

The University South Foundation Patterson Observatory opened the 11th of September 2004, and serves the greater Sierra Vista area with public viewings and group reservations.

The Patterson Observatoryis a member of the  Arizona Astronomy Consortium

The October 19 Public Night is full.

Registration is now open for the November 16, 2023 Public Night. Register below.

Admission is free, but space is limited.  Guests wishing to attend this in-person event must register.

For Parties larger than 10 people please contact us before registering. Email
This event is weather dependent and if the sky is even partly cloudy visitors should check the recording at (520) 626-6649 for a cancellation notice. 

Send an email to:  for more information.



Public Night is held once a month on the Thursday nearest first quarter moon. Observing starts a half hour after sunset.  The event is weather dependent and is canceled in the event of clouds or inclement weather. *

 2023 Schedule

Thursday Oct 19 6:30 PM

Thursday, Nov 16 6:00 PM

Thursday, Dec 14 6:00 PM

 2024 Schedule

Thursday Jan 18 6:30 PM

Thursday, February 15, 6:30 PM

Thursday March 14, 7:00 PM

Thursday April 11, 7:30 PM

Thursday May 16, 7:30 PM

Thursday June 13, 8:00 PM

Thursday Sep 5, 7:00 PM

Thursday Oct 10, 6:30 PM

Thursday Nov 7, 6:00 PM

December 5, 6:00 PM

 Click on the RED button below to register.



“Call 520 626-6649 for a recorded message about the next Patterson public night and to check for cancellations.”

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Leave a Legacy at the Patterson Observatory by purchasing a Star to place on the Comet Wall with your name engraved on the star.

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Private Events for your club, group or youth organization can be scheduled by calling the University South Foundation, Inc. office at

520 458 8278 ext. 2129

Videos for your viewing pleasure...

Virtual Tour

The Patterson Observatory named after  Mr. David Patterson

Patterson and his wife, June, were founding members of the Huachuca Astronomy Club and volunteers at the Flandrau Planetarium in Tucson, Arizona.

Patterson was a major contributor to the creation of the observatory, including the purchase of the telescopes, and constructing the building.


His legacy continues to support the observatory and the University South Foundation.

*Disclaimer: “In consideration of my attendance at observing events held at the Patterson Observatory 1140 N. Colombo Avenue, Sierra Vista AZ, I agree to hold harmless the Patterson Observatory, The University South Foundation, Inc., the University of Arizona, South and the Huachuca Astronomy Club of Southeastern Arizona (also known as HAC or the Huachuca Astronomy Club), including their members, officers and sponsors from any claims, liabilities, losses, demands, causes of action, suits and expenses (including attorney fees and costs), which may directly or indirectly be connected to my attendance at the hosted event, my participation at the event, or my presence on the premises of the Patterson Observatory and/or the University of Arizona, Sierra Vista campus. I understand that these events are, by their nature, conducted at night and in environments with low levels of lighting, or no lighting, so as not to interfere with the ability of participants to view objects through various telescopes.  Additionally, I understand that I may be required to climb ladders, or stairs, in very low light conditions, or in the absence of light, to properly utilize the telescopes”. 

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