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| manufacturer = NASAGSFC | launch_mass = | dry_mass = 〔 | payload_mass = 〔 | dimensions = Launch: 〔 | power = 1850 W | launch_date = UTC | launch_rocket = Atlas V 401 | launch_site = Cape Canaveral SLC-41 | launch_contractor = United Launch Alliance | entered_service = September 15, 2009 | disposal_type = | deactivated = | destroyed = | last_contact = | decay_date = | orbit_reference = Selenocentric | orbit_semimajor = | orbit_eccentricity = | orbit_periapsis = | orbit_apoapsis = | orbit_inclination = | orbit_period = | orbit_epoch = May 4, 2015 | apsis = selene |interplanetary = | instruments_list = | insignia = LRO mission logo (transparent background) 01.png | insignia_size = 75px }} The Lunar Reconnaissance Orbiter (LRO) is a NASA robotic spacecraft currently orbiting the Moon in an eccentric polar mapping orbit.〔(【引用サイトリンク】title=The Current Location of the Lunar Reconnaissance Orbiter )〕 The LRO mission is a precursor to future human and robotic missions to the Moon by NASA. To this end a detailed mapping program will identify safe landing sites, locate potential resources on the Moon, characterize the radiation environment, and demonstrate new technology.〔(【引用サイトリンク】title=LRO Mission Overview )〕 The probe will make a 3-D map of the Moon's surface and has provided some of the first images of Apollo equipment left on the Moon. The first images from LRO were published on July 2, 2009, showing a region in the lunar highlands south of Mare Nubium (''Sea of Clouds''). Launched on June 18, 2009, in conjunction with the Lunar Crater Observation and Sensing Satellite (LCROSS), as the vanguard of NASA's Lunar Precursor Robotic Program, this is the first United States mission to the Moon in over ten years. LRO and LCROSS are the first missions launched as part of the United States's Vision for Space Exploration program. The total cost of the mission is reported as US$583 million, of which $504 million pertains to the main LRO probe and $79 million to the LCROSS satellite. ==Mission== Developed at NASA's Goddard Space Flight Center, LRO is a large (〔) and sophisticated spacecraft planned to fly in a lunar polar orbit for a mission of one year. An extended phase of the mission of five years provided a communications relay to other lunar missions. A second extended mission is under consideration. After completing a preliminary design review in February 2006 and a critical design review in November 2006, the LRO was shipped from Goddard Space Flight Center to Cape Canaveral Air Force Station on February 11, 2009. Launch was planned for October 2008, but this slid to April as the spacecraft underwent testing in a thermal vacuum chamber. Launch was rescheduled for June 17, 2009, because of the delay in a priority military launch, and happened one day later, on June 18. The one-day delay was to allow the Space Shuttle Endeavour a chance to lift off for mission STS-127 following a hydrogen fuel leak that canceled an earlier planned launch. Areas of investigation include selenodetic global topography; the lunar polar regions, including possible water ice deposits and the lighting environment; characterization of deep space radiation in lunar orbit; and high-resolution mapping, at a maximum resolution of , to assist in the selection and characterization of future landing sites. In addition, LRO has provided some of the first images and precise locations of landers and equipment from previous American and Russian lunar missions, including the Apollo sites.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lunar Reconnaissance Orbiter」の詳細全文を読む スポンサード リンク
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