Mount Cuba Astronomical Observatory

  • Full Time Student Membership - $20.00 annual donation.

  • Individual Membership - $30.00 annual donation.

  • Family Membership - $50.00 annual donation for a family of 4, each additional member is $2.00

  • Senior Membership - $20.00 annual donation.

  • Life Membership - $500.00 or more in one calendar year,

  • Donation of $1.00 and above without membership.


  • Free admission to Public Night with reservations.

  • Free admission to Family Night with reservations.

  • Free admission to any event open to the public with reservations.

Please note: All payments for this site are processed via PayPal secure servers. When you click “Join Online”, you will be redirected to our membership form, and then to PayPal. If you do not have a PayPal account, please consider opening one.  Otherwise, use the Membership Form below to initiate the membership process. 
Membership Form
Contributions and member dues are tax deductible on both federal and state income tax returns. Mt. Cuba Astronomical Observatory is a public charity.  PLEASE NOTE: You will receive an email with further information concerning payment.  



TTo use this email address, replace .at. with @


1610 Hillside Mill Road

Wilmington, DE

(302) 654-6407

Office Hours: Monday-Friday 9 AM - 1 PM