NASA的Nancy Grace Roman空间望远镜原设计寿命为10年，但该项目近期的评估表明其运行寿命可能延长至22年以上1。这一显著延期得益于多个因素共同作用。
首次变轨计划于2026年8月31日进行，仅消耗了计划燃料的不足10%，这为额外的科学运行提供了约4年的寿命1。Roman望远镜的实际发射质量为17,760磅（8,056公斤），低于预算最大质量21,605磅（9,800公斤），质量差意味着额外携带了足以支持约4年运行的燃料1。第二次变轨和轨道插入预计同样能够节省燃料，再提供约4年额外寿命1。综合这些因素，Roman望远镜的运行时间可能比原计划延长超过10年。
望远镜预计在发射后约100天内到达设计的运行轨道L2点，时间约为2026年12月初1。进入L2轨道后，每28天需要进行一次站位保持变轨1。
NASA's Nancy Grace Roman Space Telescope is now expected to operate for at least 22 years, more than double its originally planned 10-year mission duration.1 This dramatic extension in operational life stems from a combination of factors: the telescope's first orbital maneuver consumed less than 10 percent of its budgeted fuel, the spacecraft carries additional fuel beyond its maximum planned mass allocation, and further fuel savings are anticipated during subsequent orbital insertions.1
The Roman telescope will reach its destination at the Sun-Earth Lagrange Point 2 (L2) approximately 100 days after launch, around early December 2026.1 The initial orbital adjustment, scheduled for August 31, 2026, is projected to save approximately four years of operational life compared to fuel consumption estimates.1 The spacecraft's actual launch mass of 17,760 pounds (8,056 kilograms) falls significantly below its budgeted maximum of 21,605 pounds (9,800 kilograms), a difference that translates into additional fuel reserves supporting roughly four more years of science operations.1 The second orbital maneuver and L2 insertion are similarly expected to conserve fuel, collectively providing an estimated four additional years of mission life beyond the primary science phase.1 Once positioned at L2, the telescope will require station-keeping maneuvers approximately every 28 days to maintain its orbital position.1
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