NASA issued a formal Request for Information on October 29, 2026, asking private companies to propose missions to reboost, service, or safely dispose of the Hubble Space Telescope — opening a procurement window that the agency’s own timeline suggests must close by 2032, or Hubble becomes an uncontrolled reentry hazard whose casualty probability already exceeds NASA’s public safety standard by a factor of 30.

The RFI, posted on SAM.gov with responses due by 3 p.m. ET on Monday, November 30, covers three commercial servicing scenarios: boosting Hubble to a higher orbit to extend its scientific life, servicing the telescope to upgrade its capabilities, or guiding it to a controlled reentry or permanent disposal. NASA Administrator Jared Isaacman said “Hubble still has important science ahead of it” in the RFI announcement.

What the RFI does not say explicitly — but what the underlying data make clear — is how little time remains to act.

Orbit Now Below 500 Kilometers, Reentry Possible as Early as 2028

Hubble was deployed in April 1990 at roughly 612 kilometers initial altitude (380 miles). As of the latest orbital elements, it orbits at periapsis of 470 kilometers (292 miles) and apoapsis of 475 kilometers (295 miles) — already inside the regime where atmospheric drag becomes self-reinforcing.

That self-reinforcing dynamic is the core problem. Wikipedia’s orbital decay timescale table, derived from standard atmospheric models, estimates roughly two years lifetime at 500 kilometers (311 miles) of remaining orbital life for a satellite at that altitude; at 600 kilometers (373 miles), the same analysis gives 20 years. Hubble is already below the 500-kilometer mark and descending faster than initial projections because Solar Cycle 25 has heated the upper atmosphere more than officially forecast, expanding it to higher altitudes and increasing drag.

Astronomer Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics has analyzed Hubble’s trajectory and found that reentry as early as 2028 is possible without a reboost. The Space Telescope Science Institute (STScI), which operates Hubble for NASA, puts the STScI median reentry forecast at mid-2033, with less than a 10% chance of reentry before 2030. Both estimates share a common premise: without intervention, Hubble is coming down.

Casualty Risk Already Exceeds NASA’s Safety Threshold

When Hubble does reenter, it will not burn up cleanly. At approximately 13 metric tons (28,660 pounds), the telescope was not designed for controlled atmospheric reentry, and a 2022 reentry casualty study found that roughly 20% of its mass — about 2.6 metric tons (5,732 pounds) — is expected to survive the atmosphere and reach Earth’s surface.

The study, presented at a European Space Agency space debris conference, estimates a casualty probability of 1-in-330 for a 2033 uncontrolled reentry — averaged across the full inclination band Hubble crosses at 28.5°. NASA-STD-8719.14C, the NASA debris mitigation standard, sets the maximum acceptable casualty probability for uncontrolled reentry at 1-in-10,000. Hubble’s number is 30 times above that threshold.

The debris scatter zone footprint if Hubble reenters uncontrolled spans 350 to 800 kilometers (217 to 497 miles) along the ground track. Because of Hubble’s 28.5-degree inclination, the reentry track falls within a band that includes Southeast Asia, South Asia, Central America, and the Caribbean — some of the most densely populated latitudes on Earth. The worst-case scenario identified in the study — a debris strike on Macao — projects two to four casualties; a strike on Hong Kong or Singapore is projected to cause at least one.

Nicky Fox, NASA’s associate science administrator, said “Commercial industry has rapidly evolved in recent years.” The RFI is a test of whether that evolution is fast enough.

What Hubble Already Has Built In

Here is the detail the RFI announcement does not foreground but that anyone assessing commercial feasibility must understand first: Hubble is not a passive target. During the fifth and final Space Shuttle servicing mission in May 2009, astronauts installed the Soft Capture Rendezvous System docking ring on the telescope’s aft bulkhead. The SCRS is a 76-centimeter (29.9-inch) standardized docking ring, placed specifically to give any future crewed or robotic vehicle a defined interface for rendezvous, capture, docking, and either servicing or controlled disposal.

The SCRS is the reason all three scenarios in the 2026 RFI are technically viable rather than aspirational. Without it, guided disposal would require improvised grappling, reboost would require a precisely matched non-cooperative approach, and servicing would require untested capture methods. With it, any commercial spacecraft that can match Hubble’s orbit and velocity can target a known, standardized interface — the same interface that shuttle crews used to anchor themselves while working on the telescope.

The orbital mechanics of a reboost are achievable within the capability class of current commercial propulsion vehicles. Raising Hubble from its current altitude of approximately 470 kilometers (292 miles) back to roughly 600 kilometers (373 miles) requires a velocity change (ΔV) of approximately 70 meters per second — modest by spacecraft standards, within the operational envelope of the Mission Extension Vehicle class that Northrop Grumman and others have already flown at geosynchronous orbit. The practical challenge is not the ΔV but the approach: Hubble cannot adjust its own attitude or propulsion to assist an approaching vehicle, so all rendezvous maneuvers must be performed by the servicing spacecraft.

Commercial Servicing: What the Industry Can — and Cannot — Yet Do

The 2026 RFI arrives as the commercial satellite-servicing industry is completing its first generation of operational hardware, with mixed results.

Northrop Grumman’s MRV-1 robotic servicer launch in late July 2026 introduced the first robotic satellite servicer equipped with a robotic arm capable of autonomous docking and repair. MRV-1 is optimized for geosynchronous orbit (GEO), where the majority of commercial communications satellites reside. Hubble is at low Earth orbit (LEO), approximately 470 kilometers (292 miles) — a fundamentally different operational environment with higher drag, lower communications windows per pass, and more demanding rendezvous dynamics.

Starfish Space’s Otter series has been developing LEO docking capability since 2023, with the Otter Pup 2 mission having recently attempted the first commercial satellite docking in LEO. In 2023, Astroscale and Momentus jointly proposed a commercial Hubble reboost concept that would use Momentus’ Vigoride orbital transfer vehicle with Astroscale’s proximity operations expertise.

The most recent cautionary data point comes from Katalyst Space’s LINK spacecraft, which launched in July 2026 to attempt a reboost of NASA’s Swift observatory. The Katalyst LINK mission failure — the spacecraft lost attitude control after launch and never captured Swift — illustrates that close-proximity operations with government science assets are operationally demanding in ways that tabletop engineering assessments do not always capture.

Isaacman’s Conflict of Interest, and the Risk NASA’s Scientists Identified

The NASA Administrator who issued the October 29, 2026 RFI is not a disinterested procurement official. Jared Isaacman, confirmed as NASA administrator by the Senate on December 17, 2025, is the billionaire founder of Shift4 Payments and the commander of the 2024 Polaris Dawn mission. The Polaris Dawn mission reached approximately 1,400 kilometers (870 miles) altitude — the highest human orbit since Apollo 17 — and featured the first private spacewalk.

Before his nomination, Isaacman proposed a Polaris Hubble reboost mission via his Polaris Program, to be executed using a SpaceX Dragon capsule. NASA agreed to study the concept in 2022, and Isaacman and SpaceX presented the proposal formally to the agency. In June 2024, NASA declined the Polaris reboost.

The technical concerns NASA’s scientists raised at the time are directly relevant to evaluating any bid that emerges from the 2026 RFI. NASA Astrophysics Division director Mark Clampin identified UV mirror contamination as the primary technical risk: Hubble is an ultraviolet telescope, and even trace volatile organic compounds outgassing from a docked commercial spacecraft could deposit a sub-micrometer film on the primary mirror, reducing UV throughput — the telescope’s core scientific capability. Clampin also noted that institutional knowledge lost since SM4 has affected readiness, as many of those engineers have retired.

Isaacman had stepped down as Shift4’s CEO before his final confirmation, transitioning to executive chairman, and pledged at Senate confirmation hearings to maintain no equity exposure to aerospace companies, including SpaceX. He also pledged to cancel the remaining Polaris missions. Formal divestiture from Shift4 had not been publicly confirmed as of the RFI’s issuance.

The conflict of interest context is not a disqualifying fact — NASA’s 2022 study of the Polaris concept followed standard procedures, and the decision to decline it in 2024 was made by career technical staff, not by Isaacman — but it is context any reader evaluating the RFI and its likely respondents should have.

The 2032 Window and What Comes Next

NASA has stated that any servicing mission must launch by 2032 to be effective — meaning the RFI response period, running through November 30, 2026, is the beginning of a multi-year procurement process with a hard downstream deadline. STScI has said FY2027 planning for Hubble reboost would need to begin immediately — fiscal 2027 started October 1, 2026 — meaning the RFI is not a preliminary inquiry but a functional procurement start.

Hubble project manager Patrick Crouse at NASA Goddard has maintained that the telescope has “very high reliability” and can conduct groundbreaking science through the 2020s and into the 2030s, with a greater than 70% probability of at least one functional gyroscope through 2035. That science case is what makes reboost worth considering. But the science case exists in tension with the technical risk the same agency’s scientists identified in 2024 — and with the hard calendar arithmetic that puts the procurement deadline in the same fiscal year the planning was supposed to begin.

In June 2026, NASA astrophysics director Shawn Domagal-Goldman, who leads NASA’s Astrophysics Division, said NASA would be interested in a reboost “if Hubble’s operating costs could be reduced.” The RFI is, in part, a test of whether commercial competition can make the economics work in a way that NASA’s internal budget constraints have not.

The alternative — a controlled reentry — is also a viable scenario under the RFI and may ultimately prove to be the responsible choice. A commercial vehicle docked to the SCRS could fire thrusters to lower Hubble’s orbit deliberately, guiding debris to an uninhabited ocean region rather than allowing the telescope to reenter wherever atmospheric drag sends it. That outcome would eliminate the 1-in-330 casualty risk and the international liability exposure it carries — and might cost less than a servicing mission that extends an already-aging telescope’s life by a decade.

The RFI asks respondents to evaluate all three scenarios. What it does not yet ask them to answer — but what a follow-on contract will ultimately require — is the harder question: which of the three is worth the price?

Frequently Asked Questions

Will Hubble fall to Earth, and is it dangerous?

Yes, Hubble will eventually reenter Earth’s atmosphere — the question is when and whether the reentry is controlled. Without a reboost, independent analysis suggests reentry could begin as early as 2028; NASA’s own operator, the Space Telescope Science Institute, puts the median date at mid-2033. What makes the reentry genuinely dangerous is that Hubble was not designed for controlled atmospheric entry: roughly 20% of its approximately 13 metric tons (28,660 pounds) is expected to survive and reach the ground as debris, scattered along a 350- to 800-kilometer (217- to 497-mile) footprint. A peer-reviewed study estimates a 1-in-330 reentry casualty probability for a 2033 uncontrolled reentry — 30 times above NASA’s own safety standard of 1-in-10,000.

What does the Soft Capture and Rendezvous System mean for commercial servicing?

The SCRS is a 76-centimeter (29.9-inch) standardized docking ring installed on Hubble’s aft bulkhead during the final shuttle servicing mission in 2009. Its purpose was exactly this: to give any future crewed or robotic vehicle a defined interface for docking. Without the SCRS, all three scenarios in NASA’s 2026 RFI (reboost, servicing, controlled disposal) would require improvised grappling of an uncooperative target — far more technically demanding. With it, any commercial spacecraft that can match Hubble’s orbit and velocity has a known mechanical target. The SCRS docking ring SM4 installation is the reason the RFI is an engineering question rather than a purely theoretical one.

Why did NASA reject Isaacman’s earlier Hubble reboost proposal, and why is he now issuing a new RFI?

In 2022, then-private citizen Jared Isaacman proposed a commercial Hubble reboost using a SpaceX Dragon capsule through his Polaris Program. NASA studied the concept and rejected Polaris reboost in 2024, citing two primary concerns: the risk of UV mirror contamination from spacecraft outgassing (Hubble’s ultraviolet sensitivity is its scientific edge), and the institutional knowledge that has been lost since SM4 in 2009 — many of the engineers who worked on Hubble’s servicing missions have since retired. Isaacman was nominated for NASA administrator in early 2025, confirmed in December 2025, and has now issued the October 2026 RFI in his official capacity. The same technical concerns his own scientists raised in 2024 remain on the table. He had stepped down as Shift4’s CEO before his confirmation, and formal divestiture from Shift4 had not been publicly confirmed before the RFI’s issuance.

If a commercial company proposes a reboost, what are the real engineering risks?

Beyond UV mirror contamination — the concern NASA Astrophysics Director Mark Clampin emphasized — there are several. Hubble cannot assist a docking vehicle: it has no propulsion and cannot adjust its attitude to facilitate approach. All rendezvous maneuvers must be performed by the visiting spacecraft, at an altitude where low-Earth-orbit dynamics make each orbital pass brief. The Katalyst LINK mission failure — which lost attitude control in July 2026 and never captured NASA’s Swift observatory — illustrates that close-proximity operations with government science assets are operationally demanding in ways that engineering models underestimate. A failed approach near Hubble could generate debris in the telescope’s orbit, creating risk for both the servicing vehicle and the telescope itself.