Due to the unprecedented events related to COVID-19 we are suspending all public meetings and events, including Crestview Star Parties until further notice.  You can receive email notices about the status of these and other SMCAS events by selecting the link below or going to https://groups.io/g/SMCASnews and joining the group.  



Our Society was founded in 1960 by four high school boys as a private hobby club, governed by the rigid reign of Robert’s Rules of Order, and replete with a system of five-cent fines for the least breach of protocol! Within a year, however, the San Mateo Astronomical Society began to evolve into its present form; a club which caters to the hobby interests of its members, but which also stresses public outreach, and a mission of bringing astronomy to the community in the form of free invitational programs and stargazing with telescopes. In 1976, the Society changed its name to the San Mateo County Astronomical Society, and became a California non-profit corporation, enabling it to qualify for use of certain public facilities, and to accept donations under the tax laws.

The Society met first in a private home, then in the San Mateo City Council Chambers.  It moved to the College of San Mateo in 1962 and, except for two years at Canada College, stayed until 1978, when Prop 13 funding cuts terminated College outreach.  Our return in September, 2000, though, with our energetic creation and hosting of public events, was the final element in creating a critical mass of skills, funds, commitment and initiative.  That led, in 2006-7, to CSM's fine, new planetarium, the first observatory in its history with new telescopes and equipment, and the implementation of its public outreach program.

Our group has only one membership category, which is effectively for the whole family. Members need not have any technical or professional qualification, nor do they need to be knowledgeable about astronomy. Please see the membership tab for information. 

Except for the cost of dinner at our annual Installation of Officers Banquet, our events are free and open to all members of the public.

The San Mateo County Astronomical Society holds a general meeting on the first Friday each month except July and August, starting 7:30 p.m. on the first floor of the Science Center (Bldg 36) at the College of San Mateo. (If the 1st Friday falls before 05 January, the meeting is generally held a week later). The meetings begin with refreshments, chat and a brief business session in the Integrated Science Center (ISC), followed by a guest speaker in the Planetarium itself. See the Events tab for more information.

The San Mateo County Astronomical Society (SMCAS) is a tax-exempt non-profit 501(c)(3) organization incorporated in the state of California, in good standing with the IRS and the State of California.  SMCAS is eligible to receive tax-deductible contributions in accordance with IRS code. 

We gladly accept contributions to further our outreach efforts although we would much prefer your direct involvement.  

We accept contributions of new and used astronomical equipment.  Conctact Ed Pieret at (650)595-3691 or EPieret@comcast.net to arrange.

If you would like to contribute money you can bring a contribution to any SMCAS meeting or star party and give it to a club officer or board member.  You can also mail a contribution to SMCAS, PO Box 974, Station A, San Mateo, CA, 94403. or click below to contribute by Credit Card.

We will issue donation acknowledgement letters on request.