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Member Michael Madden captured interstellar comet 3I/ATLAS using his Seestar S50 on September 13, 2025, at Rancho Cañada del Oro Open Space Preserve during our Starry Nights event. The Seestar was able to capture about 40 minutes of light until 3I/ATLAS disappeared below the ridge to the southwest.

Comet 3I/ATLAS is getting lower in the sky but should be capturable with a smart scope and would be a good challenge object for larger telescopes in dark skies this week leading into the new moon.

Comet 3I/ATLAS is the third known interstellar object, discovered in July, and is on a fast approach toward the Sun. It is currently about magnitude 14.8 and located in the constellation of Libra, between Zubenelgenubi and Zubeneschamali.

Okay #BayArea folks (and beyond): the great #COYOTEMedia has now fully launched today! News coverage and more for the area in the older alt weekly spirit. They met their extended fundraising drive earlier this summer, which was wonderful, and now good folks like @RahawaHaile and #EmmaSilvers and @witchcore are bringing it all to you on all fronts. Subscription links are at the site too! See you there! coyotemedia.org/hello-from-coy

COYOTE · Hello from COYOTE Media Collective!Billionaires shouldn't own the news. Support independent local media!

Join us on 9/20 for Coastal Cleanup Day to help protect the Bay you love!

Stopping trash starts with us! Every year, 7 trillion pieces of plastic flow into #SFBay, hurting wildlife & local communities. And this year, it''s more than just a cleanup—it's a Trashure hunt! Find hidden "trash" items and win prizes while defending the Bay.

Sign up now to volunteer & join the hunt in SF: baykeeper.org/coastalcleanupday

PUBLIC TALK: October 4, 2025, 7:30 pm

Our October meeting will be an opportunity for you to share your unique telescope builds, tell the story of your favorite astro-photos, pass on image processing tips, or brief astro-travelogues. This is a traditional activity that we haven’t done in a long time and so we’re going to take this opportunity to bring it back.

You are encouraged to attend whether you have something to share or are just interested in what your fellow association members have got up their sleeves.

Sign up at our Meetup: meetup.com/sj-astronomy/events