Located in Portland, Oregon, Rose City Astronomers (RCA) is dedicated to promoting the enjoyment and education of astronomy to our members and the general public. 

The Rose City Astronomers was formed in 1988 as an organization of amateur astronomers dedicated to the promotion, education and enjoyment of astronomy among its membership and the general public. To support that goal, the RCA sponsors a variety of activities for its membership and the general public that are geared to family participation and focused on low or no cost so that all can afford to participate. In all cases, members volunteer their time, their own personal equipment, and cover their own personal expenses to put on a variety of activities. We are a 501(C3) non-profit public benefit organization.

Monthly General Meetings

General membership meetings of the Rose City Astronomers are open to prospective members and guests. The meetings begin at 7:30 PM. on the third Monday of every month at the Oregon Museum of Science and Industry (OMSI) located at 1945 SE Water Avenue, Portland, OR 97214-3356. Parking is free and there is no charge for the meeting.  The OMSI Auditorium is equiped with T-Coil Audio Loop.

Pre-Meeeting Activities:

6:30 - 7:00 PM. on alternating months,

  • New Member Orientation.- to welcome and introduce new members to RCA programs and activities.
  • Introduction To Astronomy- an informal instructional presentation on some topic of interest and benefit to "beginners" in astronomy.

7:00 - 7:30 PM.

  • Merchandise table open
  • Book Library open
  • Membership application
  • Vendor tables open
  • Socialize and network with other members

7:30 - 8:00 PM. - RCA business meeting and announcements of upcoming programs and activities.

8:00 - 9:00 PM. - Featured guest speaker

Star Parties and other activities - check the RCA calendar

Other Member-Benefits

  RCA Affiliations

International Dark Sky Association
RCA is a member of this association and one of our goals this year is to increase participation in the IDA. This group is becoming more & more effective in fighting & even reversing the spread of light pollution.
NW Region of the International Dark Sky Association

Astronomical League
All RCA members are automatically members of the AL. The AL has many Observing Clubs with awards for completion of various observing lists. They also put out a quarterly magazine about AL activities around the nation.
NW Region of the Astronomical League

Night Sky Network with NASA and JPL.
The Night Sky Network (NSN) began five years ago with a core group of amateur and professional astronomers and educators, working with NASA at the Jet Propulsion Laboratory in Pasadena, California. Since its inception, the NSN has grown to over 300 amateur astronomy clubs across the United States. This cadre of dedicated amateur astronomers are selflessly sharing a wealth of their knowledge, telescopes and time.

Organization Information

The RCA was qualified by the IRS on May 31, 2000, as a Non-Profit(EIN 93-1205364) entitled to exemption from federal income tax under the provision of Section 501 (c) (3) of the Internal Revenue Code. As such, donors may deduct contributions to the RCA from federal income taxes as provided in section 170 of the Code

Having trouble reaching an Officer or Coordinator via email? Contact the president@rosecityastronomers.org

Our Mailing Address is:

Rose City Astronomers
1945 SE Water Ave
Portland, Oregon 97214-3356

Still having problems reaching an Officer or Coordinator via email? Leave us a message at 503-683-1551