~ Membership ~


Membership donation is for one year from the time you join.  Pubic meetings are September through June.  We adjourn July and August.

Since all our meetings and events are open to the public, consider your interest your welcome card.  Just start attending!  You will know after a few events if you want to support our society.

  • Membership / Donation (Star)

$35.00  Basic membership includes benefits listed below
  • Supernova Donation

$ 60.00

For those who can express extra support!
  • Quasar

$ 100.00

For those who have been impressed and want to support our mission.
Rittenhouse Astronomical Society  is now a recognized IRC Section 501 (c)(3) public charity under IRC section 170
eligible for tax deductible bequests, devises, transfers or gifts under sections 2055, 2106 or 2522
Receipt of your greatly appreciated donation will be e-mailed to you

Membership benefits:

  • The only astronomy club in Philadelphia  that meets regularly in a planetarium;  the Fels (one of the nations leading planetariums).

  • Regular access, weather permitting, at our meetings, to the  Bloom Observatory on the rooftop at the Franklin Institute. Always a front seat view to celestial objects!


  • The location of our meetings at the Franklin Institute and our support of the Institute's activities enables us to attract an amazing professional array of guest speakers.

  • Access to dark sky Observatories at Muddy Run Park -  Special Members Only Events