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<\/p>\nNASA\u2019s Nancy Grace Roman Space Telescope could support at least 22 years of science operations\u2014more than double its original 10-year fuel budget\u2014after a highly accurate trajectory-correction burn used less than one-tenth of the propellant allocated for the maneuver, the agency announced September 14.<\/p>\n
Roman launched at 7:26 a.m. EDT on August 30 aboard a SpaceX Falcon Heavy from Launch Complex 39A at NASA\u2019s Kennedy Space Center in Florida. The observatory is making a roughly three-month journey to the second Sun-Earth Lagrange point, or L2, about 1 million miles from Earth.<\/p>\n
On August 31, less than a day after launch, Roman fired its propulsion system for approximately three minutes to refine its trajectory toward L2. NASA said the maneuver achieved better than 99% accuracy and consumed about 40 pounds, or 18 kilograms, of propellant. Mission planners had budgeted 441 pounds, or 200 kilograms, for the correction.<\/p>\n
The difference is expected to preserve enough fuel for approximately four additional years of operations. Because the first burn placed Roman so close to its intended trajectory, a second midcourse correction scheduled for later in September should also require substantially less propellant than planned.<\/p>\n
NASA expects savings from the second correction and Roman\u2019s L2 orbital-insertion maneuver to support another four years of operations. The spacecraft is scheduled to enter its final orbit approximately 100 days after launch, around early December.<\/p>\n
Once established in its large orbit around L2, Roman will conduct station-keeping maneuvers approximately every 28 days. These relatively small burns will maintain the observatory\u2019s position in the dynamically stable region while preserving the thermal and viewing conditions required for infrared astronomy.<\/p>\n
<\/p>\n
The Lagrange points depicted in a diagram.\u00a0<\/span>(Image credit: NASA Goddard Space Flight Center Scientific Visualization Studio)<\/span><\/em><\/p>\n Roman\u2019s potential lifetime extension also reflects a substantial reduction in spacecraft mass during development and integration. Engineers established the original propellant budget using a conservative maximum observatory mass of 21,605 pounds, or 9,800 kilograms. The completed spacecraft launched at 17,760 pounds, or 8,056 kilograms.<\/p>\n The lower mass reduced the propellant required for trajectory corrections and allowed NASA to fill Roman\u2019s tanks to capacity rather than loading only the amount needed to meet the original 10-year requirement. NASA estimates that this additional launch propellant could support approximately four years of operations beyond the lifetime gained through the first correction.<\/p>\n Combined, the original 10-year allocation, four years associated with the accurate first burn, four years from the additional propellant loaded before launch, and four years expected from the remaining trajectory and insertion savings produce the current estimate of at least 22 years.<\/p>\n Propellant availability does not by itself guarantee that Roman will operate through 2048. Any extended mission would also depend on spacecraft and instrument health, continued scientific value, funding, and future NASA reviews. The fuel estimate nevertheless removes one of the main constraints on a long-duration mission because propellant is expected to be Roman\u2019s principal consumable resource.<\/p>\n Roman is designed for a five-year primary mission followed by a potential five-year extension. Its Wide Field Instrument is a 300-megapixel infrared camera with Hubble-class angular resolution and a field of view at least 100 times larger than Hubble\u2019s. The observatory will survey large areas of the sky to investigate dark energy and dark matter, map billions of galaxies, and conduct a statistical census of planetary systems.<\/p>\n The spacecraft also carries a Coronagraph Instrument intended to demonstrate advanced technologies for directly imaging exoplanets by suppressing the glare from their host stars. Its performance will help inform future missions designed to search for and characterize potentially habitable worlds.<\/p>\n A mission lasting more than two decades would allow Roman to repeat surveys over longer time baselines. That could improve measurements of changing or moving objects, increase the number of detected gravitational microlensing events and supernovae, and expand the public archive available for research beyond the observatory\u2019s primary science objectives.<\/p>\n Roman is undergoing commissioning during its cruise to L2. The next major propulsion milestone is the second midcourse correction later in September, followed by orbital insertion in early December. NASA expects to release the observatory\u2019s first images in early 2027 after completing instrument calibration and spacecraft checkout.<\/p>\n","protected":false},"excerpt":{"rendered":" NASA\u2019s Nancy Grace Roman Space Telescope could support at least 22 years of science operations\u2014more than double its original 10-year fuel budget\u2014after a highly accurate trajectory-correction burn used less than one-tenth of the propellant allocated for the maneuver, the agency announced September 14. Roman launched at 7:26 a.m. EDT on August 30 aboard a SpaceX […]<\/p>\n","protected":false},"author":1,"featured_media":89764,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[1690,558,559,678,10466,680,190,9798,316],"class_list":["post-89761","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-astrophysics","tag-dark-energy","tag-exoplanets","tag-falcon-heavy","tag-lagrange-point-2","tag-nancy-grace-roman-space-telescope","tag-nasa","tag-space-telescopes","tag-spacex"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/89761"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=89761"}],"version-history":[{"count":2,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/89761\/revisions"}],"predecessor-version":[{"id":89767,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/89761\/revisions\/89767"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media\/89764"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=89761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=89761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=89761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Lower Launch Mass Created Additional Fuel Margin<\/h2>\n
Longer Operations Could Expand Roman\u2019s Survey Legacy<\/h2>\n