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7 Iris is a large main-belt asteroid orbiting the Sun between Mars and Jupiter. [1]

48 relations: Albedo, Apparent magnitude, Asteroid belt, Astronomical unit, Axial tilt, Binoculars, Diameter, Ecliptic coordinate system, Elongation (astronomy), Geometric albedo, Geometric mean, Greek mythology, Hera, IRAS, Iris (mythology), Iron, John Russell Hind, Julian day, Julian year (astronomy), Juno (mythology), Kelvin, L chondrite, LL chondrite, London, Magnesium, Mars, Mean, Metal, Meteorite, Minor Planet Center, Nickel, Occultation, Opposition (planets), Oxford English Dictionary, Rainbow, Right ascension, Rock (geology), Roman mythology, S-type asteroid, Silicate, Space weathering, Star, United Kingdom, 15 Eunomia, 2 Pallas, 29 Amphitrite, 3 Juno, 532 Herculina.


Albedo, or reflection coefficient, derived from Latin albedo "whiteness" (or reflected sunlight) in turn from albus "white", is the diffuse reflectivity or reflecting power of a surface.

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Apparent magnitude

The apparent magnitude (m) of a celestial object is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere.

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Asteroid belt

The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter.

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Astronomical unit

The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun.

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Axial tilt

In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, or, equivalently, the angle between its equatorial plane and orbital plane.

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Binoculars, field glasses or binocular telescopes are a pair of identical or mirror-symmetrical telescopes mounted side-by-side and aligned to point accurately in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects.

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In geometry, the diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle.

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Ecliptic coordinate system

The ecliptic coordinate system is a celestial coordinate system commonly used for representing the positions and orbits of Solar System objects.

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Elongation (astronomy)

In astronomy, a planet's elongation is the angle between the Sun and the planet, with Earth as the reference point.

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Geometric albedo

In astronomy, the geometric albedo of a celestial body is the ratio of its actual brightness as seen from the light source (i.e at zero phase angle) to that of an idealized flat, fully reflecting, diffusively scattering (Lambertian) disk with the same cross-section.

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Geometric mean

In mathematics, the geometric mean is a type of mean or average, which indicates the central tendency or typical value of a set of numbers by using the product of their values (as opposed to the arithmetic mean which uses their sum).

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Greek mythology

Greek mythology is the body of myths and teachings that belong to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices.

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Hera, Greek Ἥρᾱ, Hērā, equivalently Ἥρη, Hērē, in Ionic and Homer) is the wife and one of three sisters of Zeus in the Olympian pantheon of Greek mythology and religion. Her chief function was as the goddess of women and marriage. Her counterpart in the religion of ancient Rome was Juno.Larousse Desk Reference Encyclopedia, The Book People, Haydock, 1995, p. 215. The cow, lion and the peacock were considered sacred to her. Hera's mother is Rhea and her father Cronus. Portrayed as majestic and solemn, often enthroned, and crowned with the polos (a high cylindrical crown worn by several of the Great Goddesses), Hera may bear a pomegranate in her hand, emblem of fertile blood and death and a substitute for the narcotic capsule of the opium poppy. Scholar of Greek mythology Walter Burkert writes in Greek Religion, "Nevertheless, there are memories of an earlier aniconic representation, as a pillar in Argos and as a plank in Samos." Hera was known for her jealous and vengeful nature against Zeus's lovers and offspring, but also against mortals who crossed her, such as Pelias. Paris also earned Hera's hatred by choosing Aphrodite as the most beautiful goddess.

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The Infrared Astronomical Satellite (IRAS) was the first-ever space-based observatory to perform a survey of the entire sky at infrared wavelengths.

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Iris (mythology)

In Greek mythology, Iris (Ἶρις) is the personification of the rainbow and messenger of the gods.

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Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.

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John Russell Hind

John Russell Hind FRS (12 May 1823 – 23 December 1895) was an English astronomer.

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Julian day

Julian day is the continuous count of days since the beginning of the Julian Period used primarily by astronomers.

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Julian year (astronomy)

In astronomy, a Julian year (symbol: a) is a unit of measurement of time defined as exactly 365.25 days of SI seconds each.

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Juno (mythology)

Juno (Iūno) is an ancient Roman goddess, the protector and special counselor of the state.

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The kelvin is a unit of measure for temperature based upon an absolute scale.

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L chondrite

The L type ordinary chondrites are the second most common group of meteorites, accounting for approximately 35% of all those catalogued, and 40% of the ordinary chondrites.

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LL chondrite

The LL chondrites are a group of stony meteorites, the least abundant group of the ordinary chondrites, accounting for about 10–11% of observed ordinary-chondrite falls and 8–9% of all meteorite falls (see meteorite fall statistics).

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London is the capital and most populous city of England and the United Kingdom.

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Magnesium is a chemical element with symbol Mg and atomic number 12.

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Mars is the fourth planet from the Sun and the second smallest planet in the Solar System, after Mercury.

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In mathematics, mean has several different definitions depending on the context.

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A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard, opaque, shiny, and has good electrical and thermal conductivity.

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A meteorite is a solid piece of debris from a source such as an asteroid or a comet, which originates in outer space and survives its impact with the Earth's surface.

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Minor Planet Center

The Minor Planet Center (MPC) is the official worldwide organization in charge of collecting observational data for minor planets (asteroids) and comets, calculating their orbits and publishing this information via the Minor Planet Circulars.

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Nickel is a chemical element with symbol Ni and atomic number 28.

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An occultation is an event that occurs when one object is hidden by another object that passes between it and the observer.

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Opposition (planets)

In positional astronomy, two celestial bodies are said to be in opposition when they are on opposite sides of the sky, viewed from a given place (usually Earth).

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Oxford English Dictionary

The Oxford English Dictionary (OED), published by the Oxford University Press, is a descriptive (as opposed to prescriptive) dictionary of the English language.

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A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.

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Right ascension

Right ascension (abbreviated RA; symbol α) is the angular distance measured eastward along the celestial equator from the vernal equinox to the hour circle of the point in question.

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Rock (geology)

In geology, rock is a naturally occurring solid aggregate of one or more minerals or mineraloids.

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Roman mythology

Roman mythology is the body of traditional stories pertaining to ancient Rome's legendary origins and religious system, as represented in the literature and visual arts of the Romans.

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S-type asteroid

S-type asteroids, or silicaceous asteroids, are of a stony composition, hence the name.

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A silicate is a compound containing an anionic silicon compound.

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Space weathering

Space weathering is the damage that occurs to any object exposed to the harsh environment of outer space.

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A star is a luminous sphere of plasma held together by its own gravity.

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United Kingdom

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a sovereign state in Europe.

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15 Eunomia

15 Eunomia is a very large asteroid in the inner asteroid belt.

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2 Pallas

Pallas, minor-planet designation 2 Pallas, is the second asteroid to have been discovered (after Ceres), and it is one of the largest asteroids in the Solar System.

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29 Amphitrite

29 Amphitrite is one of the largest S-type asteroids, probably third in diameter after Eunomia and Juno, although Iris and Herculina are similar in size.

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3 Juno

Juno, minor-planet designation 3 Juno in the Minor Planet Center catalogue system, was the third asteroid to be discovered and is the 11th-largest asteroid in the asteroid belt, and one of the two largest stony (S-type) asteroids, along with 15 Eunomia.

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532 Herculina

532 Herculina is a large asteroid, with a diameter of around 225 km.

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Redirects here:

(7) Iris, Iris (asteroid), Iris (astronomy).


[1] https://en.wikipedia.org/wiki/7_Iris

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