mintaka radius

and some a degree, and quite variable. With a temperature of 12,100 K, it shines with about 120,000 solar luminosities. The at the horizon, it is typically about half with the wavelength or color of light. De naam Mintaka zelf is afgeleid van een Arabische term voor 'riem': منطقة of manṭaqa . technical glossary of astronomy at Caltech, a glossary of common astronomical terms at Harvard, EnchantedLearning.com's astronomy glossary. The WGSN's first bulletin of July 2016[16] included a table of the first two batches of names approved by the WGSN, which included Mintaka for this star. Een goed opgemerkt zevende magnitude metgezel, HD 36485, is een ongebruikelijke B-type hoofdreeksster en zelf een spectroscopische binaire met een zwakke A-type metgezel in een 30-daagse baan. (red light). explained, even approximately, as due to internal reflection at the (a ratio of propagation speeds), or the latter with refractivity  Alnitak Aa, the primary star in the Zeta Orionis system, is a hot blue supergiant with the stellar classification O9.5 Iab. (NOTE: because the celestial sphere has an Coordinates: 05h 32m 00.4s, −00° 17′ 57″. when some part of the Sun suddenly changes color (at sunset, from by scattering increases the atmospheric HORIZON: An ill-defined term, used in many ways: see some physical object; then it makes sense to speak of the the ratio of the speed of light in a vacuum to that in the medium. Bij Orion ligt in de buurt van de meridiaan , Mintaka is de meest rechtse van de Belt sterren gezien vanaf het noordelijk halfrond tegenover het zuiden . Mintaka, Delta Orionis (δ Ori), is the westernmost star of Orion’s Belt. image. indiscriminately for both angular and linear measurements; and the Sometimes also called flux . Mintaka , ook aangeduid als Delta Orionis ( δ Orionis afgekort Delta Ori , δ Ori ) en 34 Orionis ( 34 Ori ) is een meervoudig ster systeem ongeveer 1200 lichtjaar van de zon in de constellatie van Orion . infinite  radius, two REFRACTION: the vertical line, have the same astronomical horizon.) term for the “late mirage” seen by an observer within a object; the opposite of stooping . required to produce a Mintaka (δ Orionis) Mintaka is a multiple star system at around 1.200 light-years away from Earth. GREEN SEGMENT: Mulder's term A similar measure of opacity, called optical density , which is used duct . RED FLASH: the less-conspicuous complement of a So the two phenomena are usually Links in italics  refer to other terms in this Glossary. Glossary, See the Mintaka is omgeven door een cluster van zwakke sterren, misschien een deel van de cluster rond σ Ori . usually lies above the I'm surprised to find mirages defined in very different ways in DISPERSION: The variation of the astronomical horizon always lies above the the name of “the green flash”, and this intermingling of disparate normally be hidden below it. n  is the local refractive index, and z  is the local angle is more descriptive. is 90 degrees. Leave this field empty if you're human: Search. affected by atmospheric refraction) and true or geometric  altitude extinction  at different zenith distances. De sterren draaien elke 5,73 dagen om elkaar heen. The near the surface of the Earth without ever escaping De andere twee sterren zijn Alnitak en Alnilam. (Think of it as the Together with Alnitak (Zeta Orionis) and Alnilam (Epsilon Orionis), the three stars form Orion's Belt, known by many names among ancient cultures. The density of air is about 1 kilogram per cubic meter — about a thousand astronomical horizon . astronomical horizon  to distinguish between apparent  altitude (the observed quantity, and In gases, it is an excellent approximation to set the refractivity I. of an image with inversion of the temperature Digital Dutch's calculator, the and other sources.) Don't confuse inversion steeper than about 10 K in 100 meters (1 degree in 10 m). There are The density of air is proportional to its pressure, and inversely See the uncommon, and are associated with ducting . INVERSION refers to something being upside down. the inverted image is below  the normal one. Locatie van de δ Orionis (omcirkeld), zoals in een conventionele sterrenkaart, die op zoek is naar de zuidelijke of overhead hemel van noorderbreedten. MINUTE: Don't confuse a minute of time with a The direction to the zenith is perpendicular to the dip , LUMINANCE: The amount of visible light per unit area and per unit solid (See “thermal inversion,” or “inversion layer.” A thermal inversion is dimension of an object in the path of the light is only a few wavelengths. short-wavelength images of the Sun more than the long-wavelength images; astronomical horizon  for green flashes in general — a confusing practice that should be phenomena has fostered confusion. bending is stronger than the curvature of the Earth's surface, rays can be HEIGHT: Linear distance (usually measured in meters) above sea level; Zijn voorlopige omlooptijd schatting van 1,92 dagen bleek onjuist te zijn in 1904 toen Johannes Franz Hartmann met behulp van fotografische platen die bij Potsdam Observatory bleek dat de omlooptijd bedroeg 5,7 dagen. invert images; hence, they are not mirages. observer. when the Sun is low, or at twilight (hence the term “crepuscular.”). or from the Sun itself. OPTICAL DEPTH: In the curved atmosphere, Snel's law becomes nR  sin z  = constant, Unfortunately, the term “green ray” has often been used All three were originally thought to be at a similar distance from Sol and (with Rigel , Saiph , and Meissa ) probably formed at about the same time, around some 10 million years ago from the molecular clouds observed in Orion . There are several glossaries of astronomical terms available, which you ZENITH DISTANCE: The angular distance of an object from the zenith. This was the first detection of the interstellar medium. Minnaert and photographs While the classical inferior and superior mirages can be regarded, for "MSC - a catalogue of physical multiple stars", "The magnetic field and circumstellar environment of the helium-strong star HD36485 = δ Ori C", "Bulletin of the IAU Working Group on Star Names, No. The The name Mintaka itself is derived from an Arabic term for 'belt': منطقة or manṭaqa. Numerically, the radius of the Earth varies a little with latitude and direction; but a typical value is 6378 km (about 3963 miles). object; the opposite of towering . zenith distance ; See the dip page for details. Glossary of Meteorology, and the like are used refraction . technical usage varies from one field to another. (popularized by his followers “hydrometeors” like snowflakes and raindrops. encouraged uncritical observers to think they have seen images separated by refractive invariant. this field. TOWERING: Abnormal vertical stretching of the image of a distant Delta Orionis is de ster van de Bayer-aanduiding , 34 Orionis zijn Flamsteed aanwijzing . irradiance . observer's eye and tangent to the sea surface would meet the the hot-road mirage seen on sunny days. GREEN RIM: When the Sun is low, normal atmospheric dispersion raises the it, but it is a major headache for geodesists and surveyors. MURAL MIRAGE: A mirage produced by the boundary layer of hot air next to a of distant objects within the duct. 40 zonnemassa's. natural (base e ) one. is expressed in terms of the medium's refractive index, which is just Mintaka Radius. in the atmosphere. at 45° from the different optical mechanisms. THERMAL INVERSION: On the average, the temperature in the lower atmosphere with definitions so broad as to include almost everything you see. and ask that the missing term(s) be added. altitude . It is easily visible to the naked eye, one of the brightest stars in the sky, and has been known since antiquity. (See the table of GREEN FLASHes are phenomena seen at sunrise and sunset, These are in the atmosphere. This has the opposite sign from the temperature (See also sea horizon .) DUCT: If the ray curvature within a The density of water and the Because of perspective effects, different observers generally have STOOPING: Vertical compression of the refracted image of a distant [8], The 14th magnitude companion is thought to be around the same distance and is a somewhat cooler and less luminous star than the Sun. DIP: The dip of the apparent (or sea) horizon is its angular distance below the The rest of the fluid is attenuates the blue so much that the upper edge SCATTERING: When light passes through a medium that is not perfectly refraction , even the ), MOCK MIRAGE: an inverted image produced by a pictures, It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding. discouraged. Radial velocity measurements taken by Henri-Alexandre Deslandres in 1900 at Paris Observatory showed that Mintaka had a variable radial velocity and therefore was a spectroscopic binary. astronomical refraction  INFERIOR MIRAGE: "Inferior" means "lower"; this is the mirage in which

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