paragraph_text: As of 29 February 2016, 124 countries were contributing a total of 105,314 personnel in Peacekeeping Operations, with Ethiopia leading the tally (8,324), followed by India (7,695) and Bangladesh (7,525). In June 2013. Pakistan contributed the highest number overall with 8,186 personnel, followed by India (7,878), Bangladesh (7,799), Ethiopia (6,502), Rwanda (4,686), Nigeria (4,684), Nepal (4,495), Jordan (3,374), Ghana (2,859), and Egypt (2,750). As of 28 February 2015, 120 countries were contributing a total of 104,928 personnel in Peacekeeping Operations, with Bangladesh leading the tally (9446). As of March 2008, in addition to military and police personnel, 5,187 international civilian personnel, 2,031 UN Volunteers and 12,036 local civilian personnel worked in UN peacekeeping missions.

paragraph_text: The Soviet Union suffered greatly in the war, losing around 27 million people. Approximately 2.8 million Soviet POWs died of starvation, mistreatment, or executions in just eight months of 1941 -- 42. During the war, the Soviet Union together with the United States, the United Kingdom and China were considered as the Big Four of Allied powers in World War II and later became the Four Policemen which was the foundation of the United Nations Security Council. It emerged as a superpower in the post-war period. Once denied diplomatic recognition by the Western world, the Soviet Union had official relations with practically every nation by the late 1940s. A member of the United Nations at its foundation in 1945, the Soviet Union became one of the five permanent members of the United Nations Security Council, which gave it the right to veto any of its resolutions.

paragraph_text: Orbiting Carbon Observatory 2 (OCO-2) is an American environmental science satellite which launched on 2 July 2014. A NASA mission, it is a replacement for the Orbiting Carbon Observatory which was lost in a launch failure in 2009. It is the second successful high-precision (better than 0.3%) observing satellite, after GOSAT.

paragraph_text: The Moon is an astronomical body that orbits planet Earth, being Earth's only permanent natural satellite. It is the fifth - largest natural satellite in the Solar System, and the largest among planetary satellites relative to the size of the planet that it orbits (its primary). Following Jupiter's satellite Io, the Moon is second - densest satellite among those whose densities are known.

paragraph_text: During the Middle Ages, the Eritrea region was known as Medri Bahri ("sea-land"). The name Eritrea is derived from the ancient Greek name for Red Sea (Ἐρυθρὰ Θάλασσα Erythra Thalassa, based on the adjective ἐρυθρός erythros "red"). It was first formally adopted in 1890, with the formation of Italian Eritrea (Colonia Eritrea). The territory became the Eritrea Governorate within Italian East Africa in 1936. Eritrea was annexed by Ethiopia in 1953 (nominally within a federation until 1962) and an Eritrean Liberation Front formed in 1960. Eritrea gained independence following the 1993 referendum, and the name of the new state was defined as State of Eritrea in the 1997 constitution.[citation needed]

paragraph_text: The creation of modern-day Eritrea is a result of the incorporation of independent, distinct kingdoms and sultanates (for example, Medri Bahri and the Sultanate of Aussa) eventually resulting in the formation of Italian Eritrea. In 1947 Eritrea became part of a federation with Ethiopia, the Federation of Ethiopia and Eritrea. Subsequent annexation into Ethiopia led to the Eritrean War of Independence, ending with Eritrean independence following a referendum in April 1993. Hostilities between Eritrea and Ethiopia persisted, leading to the Eritrean–Ethiopian War of 1998–2000 and further skirmishes with both Djibouti and Ethiopia.

paragraph_text: Following pressure by the American Rocket Society, the National Science Foundation, and the International Geophysical Year, military interest picked up and in early 1955 the Army and Navy were working on Project Orbiter, two competing programs: the army's which involved using a Jupiter C rocket, and the civilian / Navy Vanguard Rocket, to launch a satellite. At first, they failed: initial preference was given to the Vanguard program, whose first attempt at orbiting a satellite resulted in the explosion of the launch vehicle on national television. But finally, three months after Sputnik 2, the project succeeded; Explorer 1 became the United States' first artificial satellite on 31 January 1958.

paragraph_text: Sputnik 1 (/ ˈspʊtnɪk / or / ˈspʌtnɪk /; ``Satellite - 1 '', or`` PS - 1'', Простейший Спутник - 1 or Prosteyshiy Sputnik - 1, ``Elementary Satellite 1 '') was the first artificial Earth satellite. The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957, orbiting for three weeks before its batteries died, then silently for two more months before falling back into the atmosphere. It was a 58 cm (23 in) diameter polished metal sphere, with four external radio antennas to broadcast radio pulses. Its radio signal was easily detectable even by radio amateurs, and the 65 ° inclination and duration of its orbit made its flight path cover virtually the entire inhabited Earth. This surprise success precipitated the American Sputnik crisis and triggered the Space Race, a part of the Cold War. The launch ushered in new political, military, technological, and scientific developments.

paragraph_text: In 1957 the Soviet Union launched the world's first artificial satellite, Sputnik 1. Since then, about 6,600 satellites from more than 40 countries have been launched. According to a 2013 estimate, 3,600 remained in orbit. Of those, about 1,000 were operational; while the rest have lived out their useful lives and become space debris. Approximately 500 operational satellites are in low - Earth orbit, 50 are in medium - Earth orbit (at 20,000 km), and the rest are in geostationary orbit (at 36,000 km). A few large satellites have been launched in parts and assembled in orbit. Over a dozen space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Mercury, Venus, Mars, Jupiter, Saturn, a few asteroids, a comet and the Sun.

paragraph_text: The Space Race began on August 2, 1955, when the Soviet Union responded to the US announcement four days earlier of intent to launch artificial satellites for the International Geophysical Year, by declaring they would also launch a satellite ``in the near future ''. The Soviet Union beat the US to this, with the October 4, 1957, orbiting of Sputnik 1, and later beat the US to the first human in space, Yuri Gagarin, on April 12, 1961. The`` race'' peaked with the July 20, 1969, US landing of the first humans on the Moon with Apollo 11. The USSR tried but failed crewed lunar missions, and eventually canceled them and concentrated on Earth orbital space stations.

paragraph_text: USA-242 is a spacecraft, built by Boeing with a design life of 15 years. It operates from a semi-synchronous medium Earth orbit, at an altitude of an inclination of 55 degrees, in slot 5 of plane C of the GPS constellation. The new satellite was originally intended to replace the seventeen-year-old USA-117 satellite, but currently both USA-117 (SVN-33) and USA-242 (SVN-66) are in active use. USA-242 broadcasts its navigation signals using the PRN-27 signal modulation.

paragraph_text: Space Tethered Autonomous Robotic Satellite II or STARS-II, was a nanosatellite built by Japan's Kagawa University to test an electrodynamic tether in low Earth orbit, a follow-on to the STARS mission.

paragraph_text: The Israeli Space Agency coordinates all Israeli space research programs with scientific and commercial goals. In 2012 Israel was ranked ninth in the world by the Futron's Space Competitiveness Index. Israel is one of only seven countries that both build their own satellites and launch their own launchers. The Shavit is a space launch vehicle produced by Israel to launch small satellites into low earth orbit. It was first launched in 1988, making Israel the eighth nation to have a space launch capability. Shavit rockets are launched from the spaceport at the Palmachim Airbase by the Israeli Space Agency. Since 1988 Israel Aerospace Industries have indigenously designed and built at least 13 commercial, research and spy satellites. Some of Israel's satellites are ranked among the world's most advanced space systems. In 2003, Ilan Ramon became Israel's first astronaut, serving as payload specialist of STS-107, the fatal mission of the Space Shuttle Columbia.

paragraph_text: OPS 9794 was launched at 10:21 UTC on 14 July 1983, atop an Atlas E/F carrier rocket with an SGS-2 upper stage. The Atlas used had the serial number 75E, and was originally built as an Atlas E. The launch took place from Space Launch Complex 3W at Vandenberg Air Force Base, and placed OPS 9794 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-27 apogee motor.

paragraph_text: Unlike the American GPS, Russian GLONASS, and European Galileo systems, which use medium Earth orbit satellites, BeiDou-1 uses satellites in geostationary orbit. This means that the system does not require a large constellation of satellites, but it also limits the coverage to areas on Earth where the satellites are visible. The area that can be serviced is from longitude 70°E to 140°E and from latitude 5°N to 55°N. A frequency of the system is 2491.75 MHz.

paragraph_text: Astérix, the first French satellite, was launched on November 26, 1965 by a Diamant A rocket from Hammaguir, Algeria. With Astérix, France became the sixth country to have an artificial satellite in orbit after: USSR (Sputnik 1, 1957), the United States (Explorer 1, 1958), the United Kingdom (Ariel 1, 1962), Canada (Alouette 1, 1962) and Italy (San Marco 1, 1964), and the third to launch a satellite on its own (the UK, Canada and Italy's satellites were launched on American rockets). The satellite was originally designated A-1, as the French Army's first satellite, but later renamed after the popular French comics character Astérix. Due to the relatively high altitude of its orbit, it is not expected to re-enter Earth's atmosphere for several centuries.

paragraph_text: Sputnik 2 (, , "Satellite 2"), or Prosteyshiy Sputnik 2 (PS-2, , "Elementary Satellite 2") was the second spacecraft launched into Earth orbit, on 3 November 1957, and the first to carry a living animal, a Soviet space dog named Laika. Laika survived for several orbits but died a few hours after the launch.

paragraph_text: OPS 5111 was launched at 23:44 UTC on 22 February 1978, atop an Atlas E/F carrier rocket with an SGS-1 upper stage. The Atlas used had the serial number 64F, and was originally built as an Atlas F. The launch took place from Space Launch Complex 3E at Vandenberg Air Force Base, and placed OPS 5111 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-27 apogee motor.

paragraph_text: In Earth's sky, the Sun, Moon, and stars appear to move from east to west because of the rotation of Earth (so - called diurnal motion). However, orbiters such as the Space Shuttle and many artificial satellites appear to move from west to east. These are direct satellites (they actually orbit Earth in the same direction as the Moon), but they orbit Earth faster than Earth itself rotates, and so appear to move in the opposite direction of the Moon. Mars has a natural satellite Phobos, with a similar orbit. From the surface of Mars it appears to move in the opposite direction because its orbital period is less than a Martian day. There are also smaller numbers of truly retrograde artificial satellites orbiting Earth which counter-intuitively appear to move westward, in the same direction as the Moon.

paragraph_text: Andover Earth Station was one of the first satellite earth stations, located at Andover in the US state of Maine. It was built by AT&T in 1961 to communicate with the Telstar 1 satellite, the first direct relay communications satellite. It provided the first experimental satellite telephone and television service between North America and Europe. It was also used with the Relay satellite. The station was dismantled in the 1990s.

Question: The us and country building the first satellite to orbit earth became important members in an organization. When was Eritrea annexed by the country being the largest troop contributor to this organization's peace keeping mission?
Answer: 1953