To designate the position of a star, the astronomer considers an imaginary great circle passing through the celestial poles and through the star in question. This is the star's hour circle, analogous to a meridian of longitude on earth. The astronomer then measures the angle between the vernal equinox and the point where the hour circle intersects the celestial equator. This angle is called the star's right ascension and is measured in hours, minutes, and seconds rather than in the more familiar degrees, minutes, and seconds. (There are 360 degrees or 24 hours in a full circle.) The right ascension is always measured eastward from the vernal equinox. Next the observer measures along the star's hour circle the angle between the celestial equator and the position of the star. This angle is called the declination of the star and is measured in degrees, minutes, and seconds north or south of the celestial equator, analogous to latitude on the earth. Right ascension and declination together determine the location of a star on the celestial sphere. The right ascensions and declinations of many stars are listed in various reference tables published for astronomers and navigators. Because a star's position may change slightly (see proper motion and precession of the equinoxes), such tables must be revised at regular intervals. By definition, the vernal equinox is located at right ascension 0^h and declination 0°.

Another useful reference point is the sigma point, the point where the observer's celestial meridian intersects the celestial equator. The right ascension of the sigma point is equal to the observer's local sidereal time. The angular distance from the sigma point to a star's hour circle is called its hour angle; it is equal to the star's right ascension minus the local sidereal time. Because the vernal equinox is not always visible in the night sky (especially in the spring), whereas the sigma point is always visible, the hour angle is used in actually locating a body in the sky.

Land and People

Río Muni, located just north of the equator, is made up of lowland along the coast, which gradually rises in the interior to c.3,600 ft (1,100 m). Río Muni includes three major rivers—the Campo, which forms part of the northern boundary; the Benito, located in the center; and the Muni, which forms part of the southern boundary. There are forests of okume, mahogany, and walnut along the coast and the rivers. Bioko is made up of three extinct volcanoes, the loftiest of which is c.9,870 ft (3,010 m) high. The island has abundant fertile volcanic soil. Corisco and the Elobey islands are located near the the Muni estuary.

Most of the people in Equatorial Guinea belong to the Bantu ethnolinguistic group. The main ethnic group in Río Muni, where most of the population lives, is the Fang. The population of Bioko is primarily made up of the Bubi (the oldest of the modern-day inhabitants), descendants of slaves from W Africa liberated by the British in the 19th cent., and Nigerians and Fangs who migrated there in the 20th cent. Spanish and French are the official languages, but Fang, Bubi, and other indigenous languages are widely spoken. The population is nominally Christian and predominantly Roman Catholic; some indigenous religions are practiced.

Economy

Subsistence farming is the predominant occupation in Equatorial Guinea, although only 5% of the land is arable. Prior to independence, the money economy was based on the production of cocoa (mostly on Bioko) and coffee and timber (in Río Muni). Following severe deterioration of the rural economy, the government has made efforts to increase production of these products to preindependence levels. Other agricultural products include rice, yams, cassava, bananas, and palm oil. Livestock are raised and there is a fishing industry. There is food processing, sawmilling, and the manufacture of basic consumer items. The discovery and exploitation of large offshore oil and natural gas deposits increased economic growth beginning in the late 1990s, but the oil and gas revenue, largely lost to government corruption, has not significantly improved the standard of living in the generally improverished nation. The country also has unexploited deposits of titanium, iron ore, manganese, uranium, and gold. Both Río Muni and Bioko have substantial road networks; there are no railroads. Malabo is the main port.

The value of Equatorial Guinea's exports is considerably higher than the cost of its imports. The United States is the country's largest trading partner, followed by China, Spain, Italy, and France. The main exports are petroleum, methanol, timber, and cocoa; the chief imports are petroleum equpment and other machinery, foodstuffs, and beverages. Equatorial Guinea continues to depend heavily on foreign investment.

Government

Equatorial Guinea is governed under the constitution of 1991 as amended. The president, who is head of state, is popularly elected for a seven-year term; there are no term limits. The government is headed by a prime minister, who is appointed by the president. The unicameral legislature consists of the 100-seat House of People's Representatives, whose members are elected by popular vote to serve five-year terms. However, the legislature has little power, as the constitution vests most authority in the president. Administratively, the country is divided into seven provinces.

History

Bioko was claimed by (and until 1972 named after) Fernão do Po, a Portuguese navigator, in 1472, and Annobón was also claimed. During the 17th cent. the mainland's indigenous pygmy peoples were displaced by other groups, principally the Fang, who now inhabit the area. In 1778, Portugal ceded the islands, and also the commercial rights to a part of the African coast that included present-day Río Muni, to the Spanish. Hoping to export Africans as slaves to their American possessions, the Spanish sent settlers to the islands, but they died of yellow fever, and by 1781 the region was abandoned by the Europeans.

From 1827 to 1843 the British leased bases at Malabo (then called Port Clarence) and San Carlos from Spain for use by their antislavery patrols, and some freed slaves were settled on Bioko (then called Fernando Po). In 1844 the Spanish reacquired Bioko and began to occupy it. In 1879, a Cuban penal settlement was established there, and some of the convicts remained on the island after being released from prison. The general region of Río Muni was awarded to Spain at the Conference of Berlin in 1885, and its boundaries were defined precisely in a treaty with France in 1900. The islands and Río Muni were grouped together as the colony of Spanish Guinea.

Under the Spanish, economic development was largely confined to Bioko, although some measures were taken in Río Muni beginning in the 1940s. By 1960, about 6,000 Europeans (mostly Spanish) were living in the colony, and they controlled the production of cocoa and timber. In 1959 the colony was reorganized into two overseas provinces of Spain, each under a governor. In a further move to assimilate the region to Spain, three Hispano-Guineans were elected to the Spanish Cortes in 1960. However, nationalists were not satisfied with assimilation and demanded independence.

In 1963, Spain granted the country (renamed Equatorial Guinea) a limited amount of autonomy, and on Oct. 12, 1968, it received complete independence. The first president was Francisco Macías Nguema, a Fang from Río Muni. In 1969, there were violent anti-European demonstrations in Río Muni and most Europeans left the country, thus for a time severely dislocating the economy. In 1970 all political parties were merged into the United National party (PUN), headed by Macías Nguema, who in 1972 was appointed president for life. In 1973 a new constitution was adopted that abolished the nation's two semiautonomous provinces and created a unitary state.

Macías Nguema led a dictatorship characterized by campaigns against intellectuals and all those alleged to be plotting the overthrow of the regime; many were imprisoned, killed, or driven into exile. Nigerian migrant workers demanding higher wages were brutally suppressed, straining relations between Nigeria and Equatorial Guinea. Relations with Cameroon and Gabon were also strained as refugees fled to those countries. Equatorial Guinea severed its diplomatic ties with Spain in 1977. Spanish plantation owners shut down their operations, foreign investment declined, and the nation suffered a severe drop in population, with some 25,000 to 80,000 of the country's inhabitants estimated to have been killed by the government.

In 1979 the military staged a coup, executing Macías Nguema and installing his nephew, Lt. Col. Teodoro Obiang Nguema Mbasogo, as head of the military and head of state. Obiang Nguema Mbasogo lifted restrictions on the Roman Catholic Church, freed political prisoners, encouraged refugees to return, and restored diplomatic ties with Western nations. Spain and France began to reinvest, and the European Community helped rehabilitate the road system. These efforts met with limited success.

In 1982 a new constitution was approved that called for a more democratic political structure, and a decade later legislation was passed providing for a multiparty democracy. However, by 1993, when legislative elections were held, only one party, Obiang Nguema Mbasogo's Democratic Party for Equatorial Guinea (PDGE), held significant power, and the regime was widely denounced for its continued repression of opposition groups. In the 1996 multiparty presidential elections, which were boycotted by major opposition parties, the president won a landslide victory. In the late 1990s, over 100,000 citizens lived in exile abroad, and there was wide dissatisfaction with the slow pace of reform.

Obiang Nguema Mbasogo was reelected unopposed in 2002 after opposition candidates, expecting fraud, withdrew. In Mar., 2004, the government foiled an apparent coup attempt involving mainly South African mercenaries; persons involved in the coup attempt were convicted in 2004 and 2008. The national legislative elections two months later occurred in a climate of intimidation that assured a new total victory for the PDGE and its allies; a similar outcome followed the 2008 elections. When police blamed Cameroonians for armed robberies in late 2007, hundreds of Cameroonians faced harassment in Equatorial Guinea; Equatorial Guineans in Cameroon were similarly harassed in revenge.

Former federation of French possessions, western Central Africa. It was in existence from 1910 to 1959; its capital was Brazzaville. With independence in 1960, the former territory of Ubangi-Shari, to which Chad had been attached in 1920, became the Central African Republic and the Republic of Chad; the Middle Congo became the Republic of the Congo; and Gabon became the Republic of Gabon.

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Country, on the western coast of equatorial Africa and including Bioko Island. Area: 10,831 sq mi (28,051 sq km). Population (2005 est.): 504,000. Capital: Malabo. The majority of the mainland population are Bantu-speaking Fang people, with a minority of other Bantu-speaking ethnic groups (see Bantu languages). The majority on Bioko are Bubi, descendants of Bantu migrants from the mainland. Languages: Spanish, French (both official), Pidgin English (commonly spoken). Religions: Christianity (predominantly Roman Catholic, also other Christians, Protestant); also Islam, traditional beliefs. Currency: CFA franc. Bordered by Cameroon and Gabon, Equatorial Guinea's mainland region is separated by the Bight of Biafra from the island of Bioko to the northwest. The mainland has a coastal plain some 12 mi (20 km) wide, with a long stretch of beach, low cliffs to the south, and hills and plateaus to the east. The Benito River divides the region. Bioko consists of three extinct volcanic cones and has several crater lakes and rich lava soils. Dense tropical rainforest prevails throughout the mainland and includes valuable hardwoods. Animal life has been decimated by overhunting. Cacao, timber, and coffee are exported from the country, but since the 1990s petroleum is the major export. Equatorial Guinea is a republic with one legislative house; its chief of state is the president, and the head of government is the prime minister. The first inhabitants of the mainland appear to have been Bantu-speaking people. The now-prominent Fang and Bubi reached the mainland in the Bantu migrations of the late 19th and the early 20th century. Equatorial Guinea was ceded by the Portuguese to the Spanish in the late 18th century; it was frequented by slave traders, as well as by British and other merchants. Bioko was administered by British authorities (1827–58) before the official takeover by the Spanish. The mainland was not effectively occupied by the Spanish until 1936. Independence was declared in 1968, followed by a reign of terror and economic chaos under the dictatorial president Macías Nguema, who was overthrown by a military coup in 1979 and later executed. Teodoro Obiang Nguema Mbasogo became leader of the country in 1979. A new constitution was adopted in 1982, but political unrest persisted into the 21st century despite the country's oil wealth.

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