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The Two Micron All-Sky Survey (2MASS) was a survey of the whole sky in three infrared wavebands around 2 micrometres (μm): J (1.25 μm), H (1.65 μm), and Ks (2.17 μm). [1]

36 relations: Apparent magnitude, Arizona, Asteroid, Astronomical catalog, Brown dwarf, California Institute of Technology, Canis Major Overdensity, Cassegrain reflector, Cerro Tololo Inter-American Observatory, Chile, Equatorial mount, Fred Lawrence Whipple Observatory, Galaxy, Infrared, Infrared Processing and Analysis Center, Infrared Science Archive, Jet Propulsion Laboratory, La Serena, Chile, Micrometre, Milky Way, NASA, National Science Foundation, Nebula, Northern Hemisphere, Planet, Point source, Public domain, Southern Hemisphere, Star, Star cluster, University of Massachusetts Amherst, Zone of Avoidance, 2M1207, 2MASS 0939-2448, 2MASS J04151954-0935066, 2MASS J04414489+2301513.

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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Arizona (Hoozdo Hahoodzo; O'odham: Alĭ ṣonak) is a state in the southwestern region of the United States.

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Asteroids are minor planets, especially those of the inner Solar System.

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An astronomical catalog or catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery.

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Brown dwarfs are substellar objects not massive enough to sustain hydrogen-1 fusion reactions in their cores, unlike main-sequence stars.

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The California Institute of Technology or CaltechThe university itself only spells its short form as "Caltech"; other spellings such as.

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The Canis Major Dwarf Galaxy (CMa Dwarf) or Canis Major Overdensity (CMa Overdensity) is a disputed dwarf irregular galaxy in the Local Group, located in the same part of the sky as the constellation Canis Major.

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The Cassegrain reflector is a combination of a primary concave mirror and a secondary convex mirror, often used in optical telescopes and radio antennas.

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The Cerro Tololo Inter-American Observatory (CTIO) is an astronomical observatory located on Cerro Tololo in the Coquimbo Region of northern Chile, with additional facilities located on Cerro Pachón about to the southeast.

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Chile, officially the Republic of Chile, is a South American country occupying a long, narrow strip of land between the Andes to the east and the Pacific Ocean to the west.

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An equatorial mount is a mount for instruments that follows the rotation of the sky (celestial sphere) by having one rotational axis parallel to the Earth's axis of rotation.

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The Fred Lawrence Whipple Observatory is an astronomical observatory owned and operated by the Smithsonian Astrophysical Observatory (SAO) and is their largest field installation outside of their main site in Cambridge, Massachusetts.

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A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas and dust, and dark matter.

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Infrared (IR) is invisible radiant energy, electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 700 nanometers (frequency 430 THz) to 1 mm (300 GHz) (although people can see infrared up to at least 1050 nm in experiments).

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The Infrared Processing and Analysis Center (IPAC) is the NASA science center responsible for the data processing, analysis, and archiving of NASA's infrared astronomy and astrophysics missions.

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The Infrared Science Archive (IRSA) curates the science products of NASA's infrared and submillimeter projects, such as the Spitzer Space Telescope, the Wide-field Infrared Survey Explorer (WISE), the Infrared Astronomical Satellite (IRAS), and the Two Micron All-Sky Survey (2MASS).

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The Jet Propulsion Laboratory (JPL) is a federally funded research and development center and NASA field center located in Pasadena, California, United States.

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La Serena is a city and commune in northern Chile, capital of the Coquimbo Region.

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The micrometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: µm) or micrometer (American spelling), also commonly known as a micron, is an SI derived unit of length equaling 1×10−6 of a metre (SI standard prefix "micro-".

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The Milky Way is the galaxy that contains our Solar System.

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The National Aeronautics and Space Administration (NASA) is the United States government agency responsible for the civilian space program as well as aeronautics and aerospace research.

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The National Science Foundation (NSF) is a United States government agency that supports fundamental research and education in all the non-medical fields of science and engineering.

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A nebula (Latin for "cloud"; pl. nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

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The Northern Hemisphere of Earth is the half that is north of the equator.

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A planet is an astronomical object orbiting a star, brown dwarf, or stellar remnant that.

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A point source is a single identifiable localised source of something.

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Works in the public domain are those whose intellectual property rights have expired, have been forfeited, or are inapplicable.

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The Southern Hemisphere of Earth is the half which is south of the equator.

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

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Star clusters or star clouds are groups of stars.

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The University of Massachusetts Amherst (otherwise known as UMass Amherst or simply UMass) is a public research and land-grant university in Amherst, Massachusetts, United States, and the flagship of the University of Massachusetts system.

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The Zone of Avoidance (ZOA) is the area of the sky that is obscured by the Milky Way.

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2M1207, 2M1207A or 2MASS J12073346-3932539 is a brown dwarf located in the constellation Centaurus; a companion object, 2M1207b, may be the first extrasolar planetary-mass companion to be directly imaged, and is the first discovered orbiting a brown dwarf.

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2MASS 0939-2448 (full designation is 2MASS J09393548-2448279) is a probable system of two nearby T-type brown dwarfs, located in constellation Antlia at 17.4 light-years from Earth.

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2MASS J04151954-0935066 (also abbreviated to 2MASS 0415-0935) is a brown dwarf of spectral class T8, in the constellation Eridanus about 18.6 light-years from Earth.

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2MASS J04414489+2301513 (often abbreviated to 2M J044144) is a young brown dwarf approximately 450 light years away with an orbiting companion about 5–10 times the mass of Jupiter.

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Redirects here:

2 Micron All Sky Survey, Two Micron All Sky Survey, Two Micron All-Sky Survey, Two-Micron All Sky Survey.


[1] https://en.wikipedia.org/wiki/2MASS

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