Lunar Orbiter 5
{{Short description|NASA orbiter mission to the Moon (1967–1968)}}
{{Use American English|date=January 2014}}
{{Infobox spaceflight
| name = Lunar Orbiter 5
| image = NASM-A19700318000-NASM2018-00097.jpg
| image_caption = Replica of a Lunar Orbiter spacecraft
| image_size = 300px
| mission_type = Lunar orbiter
| operator = NASA
| COSPAR_ID = 1967-075A
| SATCAT = 2907
| website = [https://science.nasa.gov/mission/lunar-orbiters-program/ science.nasa.gov]
| mission_duration = {{time interval|1 Aug 1967|31 Jan 1968|sep=,}}
| manufacturer = Langley Research Center
| launch_mass = {{cvt|385.6|kg|lb}}
| dimensions = {{cvt|3.72|xx|1.65|xx|1.5|m|ft}}
| launch_date = {{start-date|August 1, 1967, 22:32:00|timezone=yes}} UTC
| launch_rocket = Atlas SLV-3 Agena-D
| launch_site = Cape Canaveral LC-13
| disposal_type = Deorbited
| decay_date = {{end-date|January 31, 1968, 07:58:08}} UTC
| orbit_epoch =
| orbit_reference = Selenocentric
| orbit_periapsis = {{cvt|194.5|km|mi}}
| orbit_apoapsis = {{cvt|6023|km|mi}}
| orbit_inclination = 85 degrees
| orbit_period = 510.08 minutes
| orbit_semimajor = {{cvt|4846.8|km|mi}}
| orbit_eccentricity = 0.26
| apsis = selene
|interplanetary =
{{Infobox spaceflight/IP
|type = orbiter
|object = Lunar
|orbits = 1,380
|arrival_date = August 5, 1967
|location = {{Lunar coords and quad cat|02.79|S|83.01|W}}
}}
| trans_frequency = 2295 MHz
| instruments_list =
{{Infobox spaceflight/Instruments
|acronym1 = - | name1 = Cesium Iodide Dosimeters
|acronym2 = - | name2 = Lunar Photographic Studies
|acronym3 = - | name3 = Meteoroid Detectors
|acronym4 = - | name4 = Selenodesy
}}
| programme = Lunar Orbiter program
| previous_mission = Lunar Orbiter 4
| next_mission =
}}
Lunar Orbiter 5, the last of the "Lunar Orbiter series", was designed to take additional Apollo and Surveyor landing site photography and to take broad survey images of unphotographed parts of the Moon's far side. It was also equipped to collect selenodetic, radiation intensity, and micrometeoroid impact data and was used to evaluate the Manned Space Flight Network tracking stations and Apollo Orbit Determination Program.
Mission summary
The spacecraft was placed in a cislunar trajectory and on August 5, 1967 was injected into an elliptical near polar lunar orbit {{convert|194.5|x|6023|km}} with an inclination of 85 degrees and a period of 8 hours 30 minutes. On August 7 the perilune was lowered to {{convert|100|km|0|sp=us}}, and on August 9 the orbit was lowered to a {{convert|99|x|1499|km|adj=on|sp=us}}, 3 hour 11 minute period.
File:Lunar Orbiter 5 coverage.jpg
The spacecraft acquired photographic data from August 6 to 18, 1967, and readout occurred until August 27, 1967. A total of 633 high resolution and 211 medium resolution frames at resolution down to {{convert|2|m|sp=us}} were acquired, bringing the cumulative photographic coverage by the five Lunar Orbiter craft to 99% of the Moon's surface. Accurate data were acquired from all other experiments throughout the mission. The spacecraft was tracked until it struck the lunar surface on command at 2.79 degrees S latitude, 83 degrees W longitude (selenographic coordinates) on January 31, 1968.
Features on the near side of the Moon that were photographic targets included Petavius, Hyginus, Messier, Tycho, Copernicus, Gassendi, Vitello, Mons Gruithuisen Gamma, Prinz, Aristarchus, Vallis Schroteri, Marius Hills, Montes Apenninus, Rimae Plato, Sinus Aestuum, Hipparchus, Rimae Sulpicius Gallus, Rimae Calippus, Censorinus, Dionysius, and the future landing site of Apollo 11.
| class="wikitable"
|+ Instruments | |
| Lunar Photographic Studies : | Evaluation of Apollo and Surveyor landing sites |
| Meteoroid Detectors : | Detection of micrometeoroids in the lunar environment |
| Caesium Iodide Dosimeters : | Radiation environment en route to and near the Moon |
| Selenodesy : | Gravitational field and physical properties of the Moon |
Image:Lunar_Orbiter_V_image_of_earth.jpg|Image of the Earth taken by Lunar Orbiter 5, enhanced by LOIRP
Image:Lunar Orbiter 5 - FRAME 5091-M - DPLA - 23d0944947b5ada4a859b87e8dbc1966.jpg|Rimae Sulpicius Gallus on August 13, 1967 ({{coord|20.5|N|9.9|E|globe:moon_type:landmark}})
Image:Lunar Orbiter 5 - FRAME 5179-H1 - DPLA - ab9cbc6ca4faed735b557a9d2a6ce14a.jpg|Southern rim of Gassendi A crater on August 17, 1967
Image:Lunar Orbiter 5 - FRAME 5198-H3 - DPLA - 6a113a5cf26e003e5423f9d1bd785b6f.jpg|Rim of Aristarchus crater on August 18, 1967 ({{coord|23.25|N|47.47|W|globe:moon_type:landmark}})
See also
{{Portal|Spaceflight}}{{Commons category|}}
References
{{Reflist|refs=
| author1= B. A. Byers
| title= Destination Moon: A History of the Lunar Orbiter Program
| url= https://ntrs.nasa.gov/citations/19770016195
| publisher= NASA
| date= 1976
| access-date= 12 November 2022
| isbn= 978-1-495-92029-5
| id= NASA-TM-X-3487 }}
| author1= Thomas P. Hansen
| title= Guide to Lunar Orbiter Photographs
| url= https://ntrs.nasa.gov/citations/19710026703
| publisher= NASA
| date= 1970
| access-date= 19 August 2024
| isbn= 978-1-499-16108-3
| id= NASA-SP-242 }}
| url= http://www.lpi.usra.edu/resources/lunarorbiter/mission/?5
| title= Lunar Orbiter Photo Gallery - Mission 5
| publisher= Lunar and Planetary Institute
| access-date= 19 August 2024 }}
| title= Lunar Orbiter 5
| url= https://science.nasa.gov/mission/lunar-orbiter-5/
| website= science.nasa.gov
| date= 8 December 2017
| publisher= NASA
| access-date= 19 August 2024 }}
| title= Lunar Orbiter 5
| url= https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1967-075A
| website= nssdc.gsfc.nasa.gov
| publisher= NASA
| access-date= 13 November 2022 }}
| title= Lunar Orbiter 5: Cesium Iodide Dosimeters
| url= https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1967-075A-04
| website= nssdc.gsfc.nasa.gov
| publisher= NASA
| access-date= 19 August 2024 }}
| title= Lunar Orbiter 5: Lunar Photographic Studies
| url= https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1967-075A-01
| website= nssdc.gsfc.nasa.gov
| publisher= NASA
| access-date= 19 August 2024 }}
| title= Lunar Orbiter 5: Meteoroid Detectors
| url= https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1967-075A-03
| website= nssdc.gsfc.nasa.gov
| publisher= NASA
| access-date= 19 August 2024 }}
| title= Lunar Orbiter 5: Selenodesy
| url= https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1967-075A-02
| website= nssdc.gsfc.nasa.gov
| publisher= NASA
| access-date= 19 August 2024 }}
}}
{{Lunar Orbiter program}}
{{Moon spacecraft}}
{{Orbital launches in 1967}}
{{NASA space program}}
Category:Spacecraft launched in 1967
Category:Spacecraft that orbited the Moon