Salyut 4
Encyclopedia
Salyut 4 ' onMouseout='HidePop("82726")' href="/topics/English_language">English
translation: Salute 4) was a Salyut
space station
launched on December 26, 1974 into an orbit
with an apogee of 355 km, a perigee
of 343 km and an orbital inclination of 51.6 degrees. It was essentially a copy of the DOS 3
, and unlike its ill-fated sibling it was a complete success. Three crews attempted to make stays aboard Salyut 4 (Soyuz 17
and Soyuz 18
docked; Soyuz 18a
suffered a launch abort). The second stay was for 63 days duration, and an unmanned Soyuz capsule remained docked to the station for three months, proving the system's long-term durability. Salyut 4 was deorbited February 2, 1977, and re-entered the Earth's atmosphere on February 3.
, designed at the Crimean Astrophysical Observatory
, and two X-ray
telescopes. One of X-ray telescopes, often called the Filin telescope, consisted of four gas flow proportional counters, three of which had a total detection surface of 450 cm² in the energy range 2-10 keV
, and one of which had an effective surface of 37 cm² for the range 0.2 to 2 keV (32 to 320 aJ
). The field of view was limited by a slit collimator to 3 in × 10 in full width at half maximum
. The instrumentation also included optical sensors which were mounted on the outside of the station together with the X-ray detectors, and power supply and measurement units which were inside the station. Ground based calibration of the detectors was considered along with in-flight operation in three modes: inertial orientation, orbital orientation, and survey. Data could be collected in 4 energy channels: 2 to 3.1 keV (320 to 497 aJ), 3.1 to 5.9 keV (497 to 945 aJ), 5.9 to 9.6 keV (945 to 1,538 aJ), and 2 to 9.6 keV (320 to 1,538 aJ) in the larger detectors. The smaller detector had discriminator levels set at 0.2 keV (32 aJ), 0.55 keV (88 aJ), and 0.95 keV (152 aJ).
, Cir X-1, Cyg X-1, and A0620-00 were published from the Filin data. A highly variable low energy of 0.6 to 0.9 keV
(96 to 144 aJ
) flux was detected in Sco X-1. Cir X-1 was not detected at all during a July 5, 1975 observation, providing an upper limit on the emission of 3.5e-11 erg·cm-2·s−1 (35 fW/m²) in the 0.2 to 2.0 keV (32 to 320 aJ) range. Cyg X-1 was observed on several occasions. Highly variable flux, in both the time and energy domains, was observed.
English language
English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...
translation: Salute 4) was a Salyut
Salyut
The Salyut program was the first space station program undertaken by the Soviet Union, which consisted of a series of nine space stations launched over a period of eleven years from 1971 to 1982...
space station
Space station
A space station is a spacecraft capable of supporting a crew which is designed to remain in space for an extended period of time, and to which other spacecraft can dock. A space station is distinguished from other spacecraft used for human spaceflight by its lack of major propulsion or landing...
launched on December 26, 1974 into an orbit
Orbit
In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet around the center of a star system, such as the Solar System...
with an apogee of 355 km, a perigee
Perigee
Perigee is the point at which an object makes its closest approach to the Earth.. Often the term is used in a broader sense to define the point in an orbit where the orbiting body is closest to the body it orbits. The opposite is the apogee, the farthest or highest point.The Greek prefix "peri"...
of 343 km and an orbital inclination of 51.6 degrees. It was essentially a copy of the DOS 3
Cosmos 557
Kosmos 557 was the designation given to DOS-3, the next space station in the Salyut program. It was originally intended to be launched as Salyut-2, but due to its failure to achieve orbit on May 11, 1973, three days before the launch of Skylab, it was renamed Kosmos-557.Due to errors in the flight...
, and unlike its ill-fated sibling it was a complete success. Three crews attempted to make stays aboard Salyut 4 (Soyuz 17
Soyuz 17
Soyuz 17 was the first of two long-duration missions to the Soviet Union's Salyut 4 space station in 1975. The flight set a Soviet mission-duration record of 29 days, surpassing the 23-day record set by the ill-fated Soyuz 11 crew aboard Salyut 1 in 1971....
and Soyuz 18
Soyuz 18
Soyuz 18 was a 1975 Soviet manned mission to Salyut 4, the second and final crew to man the space station. Pyotr Klimuk and Vitali Sevastyanov set a new Soviet space endurance record of 63 days and the mark for most people in space simultaneously was tied during the mission.-Crew:-Backup...
docked; Soyuz 18a
Soyuz 18a
Soyuz 18a was a manned Soyuz spacecraft launched by the Soviet Union in 1975, intended to dock with the orbiting Salyut 4 space station, but which failed to achieve orbit due to a serious malfunction during launch...
suffered a launch abort). The second stay was for 63 days duration, and an unmanned Soyuz capsule remained docked to the station for three months, proving the system's long-term durability. Salyut 4 was deorbited February 2, 1977, and re-entered the Earth's atmosphere on February 3.
Instrumentation
Installed on the Salyut 4 were OST-1 (Orbiting Solar Telescope) 25 cm solar telescopeSolar telescope
A solar telescope is a special purpose telescope used to observe the Sun. Solar telescopes usually detect light with wavelengths in, or not far outside, the visible spectrum.-Professional solar telescopes:...
, designed at the Crimean Astrophysical Observatory
Crimean Astrophysical Observatory
The Crimean Astrophysical Observatory is located in Ukraine. CrAO has been publishing the Bulletin of the Crimean Astrophysical Observatory since 1947, in English since 1977. The observatory facilities are located near the settlement of Nauchny since the mid-1950s; before that, they were further...
, and two X-ray
X-ray
X-radiation is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV rays and longer than gamma...
telescopes. One of X-ray telescopes, often called the Filin telescope, consisted of four gas flow proportional counters, three of which had a total detection surface of 450 cm² in the energy range 2-10 keV
Kev
Kev can refer to:*Kev Hawkins, a fictional character.*Kevin, a given name occasionally shortened to "Kev".*Kiloelectronvolt, a unit of energy who symbol is "KeV".* Krefelder Eislauf-VereinKEV can refer to:...
, and one of which had an effective surface of 37 cm² for the range 0.2 to 2 keV (32 to 320 aJ
AJ
AJ may refer to:-Products, brands, tools:* Aj Daily, a newspaper* AJ Savage, a United States Navy aircraft built by North American Aviation* Adjustable spanner* An inbred strain of mouse-Places:* Apache Junction, Arizona...
). The field of view was limited by a slit collimator to 3 in × 10 in full width at half maximum
Full width at half maximum
Full width at half maximum is an expression of the extent of a function, given by the difference between the two extreme values of the independent variable at which the dependent variable is equal to half of its maximum value....
. The instrumentation also included optical sensors which were mounted on the outside of the station together with the X-ray detectors, and power supply and measurement units which were inside the station. Ground based calibration of the detectors was considered along with in-flight operation in three modes: inertial orientation, orbital orientation, and survey. Data could be collected in 4 energy channels: 2 to 3.1 keV (320 to 497 aJ), 3.1 to 5.9 keV (497 to 945 aJ), 5.9 to 9.6 keV (945 to 1,538 aJ), and 2 to 9.6 keV (320 to 1,538 aJ) in the larger detectors. The smaller detector had discriminator levels set at 0.2 keV (32 aJ), 0.55 keV (88 aJ), and 0.95 keV (152 aJ).
Science
Among others, observations of Sco X-1Scorpius X-1
Scorpius X-1 is an X-ray source located roughly 9000 light years away in the constellation Scorpius. Scorpius X-1 was the first extrasolar X-ray source discovered, and, aside from the Sun, it is the strongest source of X-rays in the sky...
, Cir X-1, Cyg X-1, and A0620-00 were published from the Filin data. A highly variable low energy of 0.6 to 0.9 keV
Kev
Kev can refer to:*Kev Hawkins, a fictional character.*Kevin, a given name occasionally shortened to "Kev".*Kiloelectronvolt, a unit of energy who symbol is "KeV".* Krefelder Eislauf-VereinKEV can refer to:...
(96 to 144 aJ
AJ
AJ may refer to:-Products, brands, tools:* Aj Daily, a newspaper* AJ Savage, a United States Navy aircraft built by North American Aviation* Adjustable spanner* An inbred strain of mouse-Places:* Apache Junction, Arizona...
) flux was detected in Sco X-1. Cir X-1 was not detected at all during a July 5, 1975 observation, providing an upper limit on the emission of 3.5e-11 erg·cm-2·s−1 (35 fW/m²) in the 0.2 to 2.0 keV (32 to 320 aJ) range. Cyg X-1 was observed on several occasions. Highly variable flux, in both the time and energy domains, was observed.
Specifications
- Length - 15.8 m
- Maximum diameter - 4.15 m
- Habitable volume - 90 m³
- Weight at launch - 18,900 kg
- Launch vehicle - Proton (three-stage)
- Orbital inclination - 51.6°
- Area of solar arrays - 60 m²
- Number of solar arrays - 3
- Electricity production - 4 kW
- Resupply carriers - Soyuz Ferry
- Number of docking ports - 1
- Total manned missions - 3
- Total unmanned missions - 1
- Total long-duration manned missions - 2
Visiting spacecraft and crews
- Soyuz 17Soyuz 17Soyuz 17 was the first of two long-duration missions to the Soviet Union's Salyut 4 space station in 1975. The flight set a Soviet mission-duration record of 29 days, surpassing the 23-day record set by the ill-fated Soyuz 11 crew aboard Salyut 1 in 1971....
- January 11 - February 10, 1975- Georgi GrechkoGeorgi GrechkoGeorgy Mikhaylovich Grechko is a retired Soviet cosmonaut who flew on several space flights among which Soyuz 17, Soyuz 26, and Soyuz T-14.Grechko graduated from the Leningrad Institute of Mechanics with a doctorate in mathematics. He was a member of Communist Party of Soviet Union...
- Aleksei GubarevAleksei GubarevAleksei Aleksandrovich Gubarev was a Soviet cosmonaut who flew on two space flights: Soyuz 17 and Soyuz 28.Gubarev graduated from the Soviet Naval Aviation School in 1952 and went on to serve with the Soviet Air Force...
- Georgi Grechko
- Soyuz 18aSoyuz 18aSoyuz 18a was a manned Soyuz spacecraft launched by the Soviet Union in 1975, intended to dock with the orbiting Salyut 4 space station, but which failed to achieve orbit due to a serious malfunction during launch...
- April 5, 1975 - Launch abort- Vasili Lazarev
- Oleg Makarov
- Soyuz 18Soyuz 18Soyuz 18 was a 1975 Soviet manned mission to Salyut 4, the second and final crew to man the space station. Pyotr Klimuk and Vitali Sevastyanov set a new Soviet space endurance record of 63 days and the mark for most people in space simultaneously was tied during the mission.-Crew:-Backup...
- May 24 - July 26, 1975- Pyotr KlimukPyotr KlimukPyotr Ilyich Klimuk Klimuk attended the Leninski Komsomol Chernigov High Aviation School and entered the Soviet Air Force in 1964. The following year, he was selected to join the space programme.His first flight was a long test flight on Soyuz 13 in 1973...
- Vitali SevastyanovVitali SevastyanovVitaly Ivanovich Sevastyanov was a Soviet cosmonaut who flew on the Soyuz 9 and Soyuz 18 missions.He trained as an engineer at the Moscow Aviation Institute and after graduation in 1959, joined Sergey Korolev's design bureau, where he worked on the design of the Vostok spacecraft. He also lectured...
- Pyotr Klimuk
- Soyuz 20Soyuz 20Soyuz 20 was an unmanned spacecraft launched by the Soviet Union. It was a long-duration test of the Soyuz spacecraft that docked with the Salyut 4 space station. Soyuz 20 performed comprehensive checking of improved on-board systems of the spacecraft under various flight conditions. It also...
- November 17, 1975 - February 16, 1976- no crew
Salyut 4 Expeditions
| Expedition | Crew | Launch date | Flight up | Landing date | Flight down | Duration (days) | Notes |
|---|---|---|---|---|---|---|---|
| Soyuz 17 | Georgi Grechko Georgi Grechko Georgy Mikhaylovich Grechko is a retired Soviet cosmonaut who flew on several space flights among which Soyuz 17, Soyuz 26, and Soyuz T-14.Grechko graduated from the Leningrad Institute of Mechanics with a doctorate in mathematics. He was a member of Communist Party of Soviet Union... , Aleksei Gubarev Aleksei Gubarev Aleksei Aleksandrovich Gubarev was a Soviet cosmonaut who flew on two space flights: Soyuz 17 and Soyuz 28.Gubarev graduated from the Soviet Naval Aviation School in 1952 and went on to serve with the Soviet Air Force... |
January 11, 1975 21:43:37 UTC |
Soyuz 17 Soyuz 17 Soyuz 17 was the first of two long-duration missions to the Soviet Union's Salyut 4 space station in 1975. The flight set a Soviet mission-duration record of 29 days, surpassing the 23-day record set by the ill-fated Soyuz 11 crew aboard Salyut 1 in 1971.... |
February 10, 1975 11:03:22 UTC |
Soyuz 17 Soyuz 17 Soyuz 17 was the first of two long-duration missions to the Soviet Union's Salyut 4 space station in 1975. The flight set a Soviet mission-duration record of 29 days, surpassing the 23-day record set by the ill-fated Soyuz 11 crew aboard Salyut 1 in 1971.... |
29.56 | Launch from Baikonur; landing 110 km northeast of Tselinograd; docking on space station Salyut 4, which had been launched 3 days earlier; transfer into space station and 29 days stay time there; astronomical experiments. |
| Soyuz 18 | Pyotr Klimuk Pyotr Klimuk Pyotr Ilyich Klimuk Klimuk attended the Leninski Komsomol Chernigov High Aviation School and entered the Soviet Air Force in 1964. The following year, he was selected to join the space programme.His first flight was a long test flight on Soyuz 13 in 1973... , Vitali Sevastyanov Vitali Sevastyanov Vitaly Ivanovich Sevastyanov was a Soviet cosmonaut who flew on the Soyuz 9 and Soyuz 18 missions.He trained as an engineer at the Moscow Aviation Institute and after graduation in 1959, joined Sergey Korolev's design bureau, where he worked on the design of the Vostok spacecraft. He also lectured... |
May 24, 1975 14:58:10 UTC |
Soyuz 18 Soyuz 18 Soyuz 18 was a 1975 Soviet manned mission to Salyut 4, the second and final crew to man the space station. Pyotr Klimuk and Vitali Sevastyanov set a new Soviet space endurance record of 63 days and the mark for most people in space simultaneously was tied during the mission.-Crew:-Backup... |
July 26, 1975 14:18:18 UTC |
Soyuz 18 Soyuz 18 Soyuz 18 was a 1975 Soviet manned mission to Salyut 4, the second and final crew to man the space station. Pyotr Klimuk and Vitali Sevastyanov set a new Soviet space endurance record of 63 days and the mark for most people in space simultaneously was tied during the mission.-Crew:-Backup... |
62.97 | Launch from Baikonur; landing 56 km east of Arkalyk; 2. crew of spacestation Salyut 4; 62 days staying time; intensive fitness training; breeding of "space vegetable"; solar observation; taking photographs of Earth surface. |
See also
- Space stationSpace stationA space station is a spacecraft capable of supporting a crew which is designed to remain in space for an extended period of time, and to which other spacecraft can dock. A space station is distinguished from other spacecraft used for human spaceflight by its lack of major propulsion or landing...
for statistics of occupied space stations - SalyutSalyutThe Salyut program was the first space station program undertaken by the Soviet Union, which consisted of a series of nine space stations launched over a period of eleven years from 1971 to 1982...
- TKS spacecraftTKS spacecraftTKS spacecraft was a Soviet spacecraft design in the late 1960s intended to supply the military Almaz space station. The spacecraft was designed for manned or autonomous cargo resupply use...
- AlmazAlmazThe Almaz program was a series of military space stations launched by the Soviet Union under cover of the civilian Salyut DOS-17K program after 1971....
- MirMirMir was a space station operated in low Earth orbit from 1986 to 2001, at first by the Soviet Union and then by Russia. Assembled in orbit from 1986 to 1996, Mir was the first modular space station and had a greater mass than that of any previous spacecraft, holding the record for the...
- SkylabSkylabSkylab was a space station launched and operated by NASA, the space agency of the United States. Skylab orbited the Earth from 1973 to 1979, and included a workshop, a solar observatory, and other systems. It was launched unmanned by a modified Saturn V rocket, with a mass of...
- International Space StationInternational Space StationThe International Space Station is a habitable, artificial satellite in low Earth orbit. The ISS follows the Salyut, Almaz, Cosmos, Skylab, and Mir space stations, as the 11th space station launched, not including the Genesis I and II prototypes...