Epsilon Indi (ε Ind / ε Indi) is a star approximately 11.82 light years from Earth's solar system. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... Orion is a remarkable constellation, visible from most places on the globe (but not always the whole year long). ... Indus is a southern constellation that is supposed to represent an American Indian. ... Right ascension (RA; symbol α: Greek letter alpha) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... Shanil Davendra Singh rules 4 life! ... Shanil Davendra Singh rules 4 life! ... Most stars are of nearly constant luminosity. ... Astrometry is a part of astronomy and deals with the positions of stars and other celestial bodies, their distances and movements. ... Radial velocity is the velocity of an object in the direction of the line of sight. ... kilometre per second is an SI derived unit of both speed (scalar) and velocity (vector), signified by the symbol km/s or km s-1. ... The proper motion of a star is the motion of the position of the star in the sky (the change in direction in which we see it, as opposed to the radial velocity) after eliminating the improper motions of the stars, which affect their measured coordinates but are not real... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... Parallax (Greek: παραλλαγή (parallagé) = alteration) is the change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of said observer. ... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... The distance between two points is the length of a straight line segment between them. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... The parsec (symbol pc) is a unit of length used in astronomy. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standardized distance away. ... Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ... In astronomy, the solar mass is a unit of mass used to express the mass of stars and larger objects such as galaxies. ... RADIUS (Remote Authentication Dial In User Service) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ... In astronomy, the solar radius is a unit of length used to express the size of stars and larger objects such as galaxies. ... // In General Physics In general physics, luminosity (more properly called luminance) is the density of luminous intensity in a given direction. ... The solar luminosity is a unit of luminosity (power emitted in the form of photons) conventionally used by astronomers to give the luminosities of stars. ... Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. ... The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ... In astronomy, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium. ... Rotation of a planar figure around a point Rotation of a planar body is the movement when points of the body travel in circular trajectories around a fixed point called the center of rotation. ... The Pleiades star cluster A star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... In astronomy, many stars are referred to simply by catalogue numbers. ... The Henry Draper Catalogue is an astronomy catalogue with astrometric and spectroscopic data about more than 225,000 stars. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... Earth, also known as Terra, and (mostly in the 19th century) Tellus, is the third-closest planet to the Sun. ... Presentation of the solar system (not to scale) The solar system comprises our Sun and the retinue of celestial objects gravitationally bound to it. ...

In January 2003, astronomers announced the discovery of a brown dwarf with a mass of 47±10 Jupiter masses in orbit around Epsilon Indi at a distance of about 1500 AU. In August of 2003, astronomers discovered that this brown dwarf was actually a binary brown dwarf with a separation of about 2.5 AU. Both are spectral class T; the larger brown dwarf has a mass of 47 +/-10 Jupiter masses, and the smaller 28±7 Jupiter masses. 2003 (MMIII) is a common year starting on Wednesday of the Gregorian calendar. ... Brown dwarfs are sub-stellar objects (~5 to 90 Jupiter masses) that do not fuse hydrogen into helium in their cores, as do stars on the main sequence, but have fully convective surfaces and interiors, with no chemical differentiation by depth. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... The astronomical unit (AU or au or a. ... T is the twentieth letter of the modern Latin alphabet. ...

As seen from Epsilon Indi, the Sun is a 2nd-magnitude star in Ursa Major, near the bowl of the Big Dipper. Ursa Major (Ursa Maior in Latin) is a constellation visible throughout the year in the northern hemisphere. ... Ursa Major is a constellation visible throughout the year in the northern hemisphere. ...

Epsilon Indi has the second highest proper motion (second only to 61 Cygni) of any naked eye star, or possibly the third highest since the magnitude 6.4 Groombridge 1830 is a naked eye star under exceptionally dark skies. The proper motion of a star is the motion of the position of the star in the sky (the change in direction in which we see it, as opposed to the radial velocity) after eliminating the improper motions of the stars, which affect their measured coordinates but are not real... 61 Cygni is a star in the constellation Cygnus. ... A naked eye is a figure of speech, referring to human eyes unaided by enhancing equipment such as a telescope or binoculars. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... Groombridge 1830 is a star. ...

Epsilon Indi in fiction

Epsilon Indi is held by many Star Trek fans to be the home star system of the Andorian race. The star system also made an appearance in the Star Trek Original Series episode And the Children Shall Lead, where Epsilon Indi was the home star system to an evil energy being known as "Gorgan". Star Trek - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... Shran, from Enterprise In the fictional Star Trek universe, the Andorians are a species of humanoids native to the moon Andor. ... The starship Enterprise as it appeared on Star Trek Star Trek is a culturally significant science fiction television series created by Gene Roddenberry in the 1960s. ... And the Children Shall Lead is a third season episode of Star Trek: The Original Series, and was broadcast October 11, 1968. ...

In the Worldwar books by Harry Turtledove, Epsilon Indi is one of the subject star systems ("Halless") of the alien Race. Worldwar is a series of four alternate history science fiction novels by Harry Turtledove. ... Harry Turtledove at Worldcon 2005 in Glasgow Harry Norman Turtledove (born June 14, 1949), is a historian and prolific novelist who has written historical fiction, fantasy, and science fiction works. ...

References and external links

• Epsilon Indi Ba and Bb, a pair of brown dwarfs 12 ly away
• Sol Station — Epsilon Indi
• McCaughgrean et al., "ε Indi Ba,Bb: The nearest binary brown dwarf" http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2004A%26A...413.1029M&db_key=AST&data_type=HTML&format=&high=439f77593b09803

See also

• List of nearest stars