STScI logo HSTbanner

HST Change Request

Minor change requests

Minor change requests are handled by sending email to your program coordinator. Examples of minor changes are:

Major change requests

Major change requests require a formal change request form submitted to the Telescope Time Review Board (TTRB). Examples of major changes are:

More information on the policies and procedures for submitting change requests can be found in Policies for the Telescope Time Review Board (TTRB).

Proceed With Major Change Request