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Hubble Space Telescope
Current and Previous Cycle Results

Cycle 23 Results
Cycle 22 Joint HST/XMM Results from the XMM Review Fall 2013
Multi-Cycle Treasury Program Information
These catalogs are all generated from the submitted Phase I proposals. The official Phase II Catalogs are maintained at the Archive website and are created after Phase II submission. You can find the Abstracts, Titles and Planned and Archived Exposure Catalogs at:

Past Programs (Cycle 6 - 22)

DD Time

Up to 10% of the available HST observing time may be reserved for Director's Discretionary (DD) allocation.

Mid-Cycle Proposals

Up to 200 orbits per cycle will be available for Mid-Cycle GO programs. Mid-Cycle programs were initiated in Cycle 23 to provide the community with an opportunity to propose for in-cycle observations of recently-discovered, non-variable objects. As such, they complement Director’s Discretionary programs, which target unexpected transient phenomena and time-critical observations..


Scheduling Considerations