TheHubble Origins Probe (HOP) was a proposal for an orbitaltelescope made in 2005 in response to the first cancellation of the fourthHubble Space Telescope (HST) servicing mission.[1] It would have used anAtlas V rocket or similar launch vehicle to launch a much lighter,unaberrated mirror and optical telescope assembly, using the instruments that had already been built for SM4, along with a new wide-field imager. It would have cost between $700 million and $1 billion.[2]
Funding for the mission was never allocated; in February 2005,Sean O'Keefe, the NASA administrator who had cancelled SM4, resigned.Michael D. Griffin,NASA administrator after O'Keefe, reinstated the servicing missions,[3] making HOP redundant.
| Current instruments |   | |
|---|---|---|
| Previous instruments | ||
| Space Shuttle missions | ||
| Special fields and images |
| |
| Related | ||
| Operating |
| ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Planned | |||||||||||||
| Proposed | |||||||||||||
| Retired |
| ||||||||||||
| Hibernating (Mission completed) | |||||||||||||
| Lost/Failed | |||||||||||||
| Cancelled | |||||||||||||
| Related |
| ||||||||||||
