A total of 42 high resolution and 187 medium resolution frames were taken and transmitted to Earth covering over 5 milliom square km of the Moon's surface, accomplishing about 75% of the intended mission, although a number of the early high-res photos showed severe smearing. The spacecraft acquired photographic data from August 18 to 29, 1966, and readout occurred through September 14, 1966. On 21 August perilune was dropped to 58 km and on 25 August to 40.5 km. The initial orbit was 189.1 km x 1866.8 km and had a period of 3 hours 37 minutes and an inclination of 12.2 degrees. Lunar Orbiter 1 was injected into an elliptical near-equatorial lunar orbit 92.1 hours after launch. The star tracker problem was resolved by navigating using the Moon as a reference and the overheating was abated by orienting the spacecraft 36 degrees off-Sun to lower the temperature. The spacecraft experienced a temporary failure of the Canopus star tracker (probably due to stray sunlight) and overheating during its cruise to the Moon. The spacecraft was placed in an Earth parking orbit on 10 August 1966 at 19:31 UT and injected into a cislunar trajectory at 20:04 UT. It was also equipped to collect selenodetic, radiation intensity, and micrometeoroid impact data.
LUNAR ORBITER 1 VERIFICATION
We hope the years of efforts by scientists and researchers will advance the country's space exploration initiative.The Lunar Orbiter 1 spacecraft was designed primarily to photograph smooth areas of the lunar surface for selection and verification of safe landing sites for the Surveyor and Apollo missions. "We are aware of high anticipation from the public. "We are fully prepared for the liftoff, an assessment by researchers who have been closely monitoring since Danuri's arrival in the U.S.," a KARI official said. KARI said the liftoff will proceed as planned, without any issues. They carried out extensive space environment simulation tests, as measured by extreme temperature and electromagnetic condition simulations. Courtesy of Ministry of Science and ICTįriday's liftoff followed a press briefing in early June, organized after KARI officials completed a pre-shipment review. SpaceX's Falcon 9 carrying Danuri remains ready for liftoff at Cape Canaveral Space Force Station in Florida, Aug.
LUNAR ORBITER 1 FULL
It then will commence initial operation and conduct function tests for one month, before beginning 11 months of full operation through December.
16, and make five trajectory corrections thereafter to approach low lunar orbit, a mark below 100 kilometers in altitude, Dec. The orbiter will first enter lunar orbit, Dec. The method uses less energy and thus conserves fuel by about 25 percent, but takes longer to reach the destination. The first communication with KARI will be possible about 60 minutes after launch.Ībout four months of operation thereafter will be monitored jointly by KARI and their counterparts at NASA.ĭanuri will use Ballistic Lunar Transfer (BLT), a "low-energy" transfer from the Earth to the moon using the gravity of both and that of the sun. Its computer will activate a program before entering the expected trajectory. The Falcon 9 will release Danuri about 40 minutes after the launch at an altitude of 1,656 kilometers, following first- and second-stage separations. The orbiter was erected around 3 p.m., Thursday, for a final checkup before countdown including fueling. The liftoff had been initially scheduled for Wednesday, but faced a two-day delay due to rocket maintenance issues. It will be launched for its moon mission at 8:08 a.m., Friday, carried by SpaceX's Falcon 9, a U.S.
The orbiter, otherwise known as the Korea Pathfinder Lunar Orbiter (KPLO), was developed by the Korea Aerospace Research Institute (KARI), with assistance of the U.S.'s National Aeronautics and Space Administration (NASA).ĭanuri left Incheon International Airport, July 5, and arrived at Cape Canaveral Space Force Station (CCSFS) in Florida, July 7. Korea's lunar orbiter, Danuri, is fully prepared for a successful launch on Friday, according to the state-run aeronautics and space agency, Thursday. Researchers at Korea Aerospace Research Institute (KARI) conduct a final check of Danuri at the institute's headquarters in Daejeon in May.
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