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Hubble Space Telescope
Proposing

NOTE: WFPC2 has been removed from HST, and is therefore not available for proposing new observations. Archival Research proposals using existing WFPC2 data are of course supported.

The HST General Observer proposal process is divided into two Phases. Phase I proposals contain a scientific justification and abbreviated technical specifications for review by the Telescope Allocation Committee in a particular Cycle. Phase II proposals provide many more technical details for programs recommended by the TAC and approved by the STScI Director for implementation. The information required by proposers for Phases I and II are provided in the links, below.

Cycle 19 Announcement

HST Proposing Overview

Phase II Instructions



WFPC2 Proposing FAQs

The Astronomers Proposal Tool (APT) will be of great utility for both Phases.

Proposing Resources:

Instrument Handbook

Phase I Updates for APT

Phase II Updates for APT

WFPC2 Exposure Time Calculator

Information about Existing HST Programs