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2017 Solar Eclipse Photos

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Photo of the Month for September, 2018
Comet 21P/Gliacobini-Zinner traversing M35

The above photo was taken on September 15th at 3:08 AM. The comet was reported to be traversing M35 on that date so I took a chance, slewed my telescope to M35, and shot in the blind. I never saw the comet visually or through the telescope. This one had been a real challenge to capture.


Activities for September, 2018

CAS Board Meeting

Saturday, September 20, 2018 at 7:00pm


Monthly Meeting at Lowell Observatory

Saturday, September 22, 2018
Dr. Chadwick A. Trujillo, NAU


Title: “The Search for an Undiscovered Giant Planet in our Solar System”

In the last few years, evidence has increased that there may be an undiscovered giant planet lurking in the outer reaches of our solar system. This planet could explain some of the unusual orbits we see in the most distant Kuiper Belt Objects. I'll discuss why we think the planet may be visible in the autumn night sky and how we are using the most powerful survey telescopes in the world to search for it.


CAS Monthly Meetings and Astronomical Programs are held the Saturday closest to the Full Moon at the Mars Hill Campus of Lowell Observatory, Hendricks Center for Planetary Studies Auditorium (6:45 pm - 8:00 pm., unless otherwise noted) followed by refreshments, and informal discussion. Meetings are open and free to the public.

For a full list of this years activities see: CAS 2018 Calendar

What's New

Announcement: The 2019 Club Calendar is Available

The 2019 club calendar with images submitted by our club members based on a lunar theme is available for order.

2019 Calendar Thumbnail Image

It can be ordered via PayPal on the "Join Us" web page here.

Use the CAS club email info@coconinoastro.org to request an alternate payment method


CAS is running an introductory workshop that is designed to help interested parties in learning how to take pictures of the moon through a telescope. Our aim is to simplify this process as much as possible. We will have a field session and a classroom processing session.

By the end of the classroom session, you will have a nice lunar image that will be suitable for print.

Our proposed field sessions will be on November 16th and 17th at Buffalo Park. (The backup date will be November 18th.)

Our classroom session will be November 24th at the main Flagstaff library.

If you would like to attend or have questions, please email us at:

flagstaff.astrophoto@gmail.com


The Annual Flagstaff Star Party at Buffalo Park October 4-6

Telescopes provided by CAS members and other orginizations are going to be avaliable for viewing. Telescopes provided by CAS members and other organizations are going to be available for viewing. See the following link for further information.

Flagstaff Star Party

CAS members wishing to participate plese use this link,



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