The Two Micron All-Sky Survey , or 2MASS , was an astronomical survey of the whole sky in infrared light. It took place between 1997 and 2001, in two different locations: at the U.S. Fred Lawrence Whipple Observatory on Mount Hopkins, Arizona, and at the Cerro Tololo Inter-American Observatory in Chile, each using a 1.3-meter telescope for the Northern and Southern Hemisphere , respectively. It was conducted in the short-wavelength infrared at three distinct frequency bands ( J , H , and K ) near 2 micrometres , from which the photometric survey with its HgCdTe detectors derives its name.
4-506: 2MASS produced an astronomical catalog with over 300 million observed objects , including minor planets of the Solar System, brown dwarfs , low-mass stars , nebulae , star clusters and galaxies . In addition, 1 million objects were cataloged in the 2MASS Extended Source Catalog ( 2MASX ). The cataloged objects are designated with a "2MASS" and "2MASX"-prefix respectively. The final data release for 2MASS occurred in 2003, and
8-500: Is served by the Infrared Science Archive . The goals of this survey included: Numerical descriptions of point sources ( stars , planets , asteroids ) and extended sources (galaxies, nebulae) were cataloged by automated computer programs to an average limiting magnitude of about 14. More than 300 million point sources and 1 million extended sources were cataloged. In November 2003, a team of scientists announced
12-1149: Is sponsored by the University of Massachusetts Amherst , the Infrared Processing and Analysis Center (IPAC, run by Jet Propulsion Laboratory (JPL) and Caltech ), NASA , and the National Science Foundation (NSF). Astronomical catalog 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. The oldest and largest are star catalogues . Hundreds have been published, including general ones and special ones for such objects as infrared stars , variable stars , giant stars , multiple star systems , star clusters , and so forth. General catalogs for deep space objects or for objects other than stars are also large. Again, there are specialized ones for nebulas , galaxies , X-ray sources , radio sources , quasars and other classes. The same
16-537: The discovery of the Canis Major Dwarf Galaxy , at that time the closest known satellite galaxy to the Milky Way, based on analysis of 2MASS stellar data. The resulting data and images from the survey are currently in the public domain , and may be accessed online for free by anyone. There is also a list of 2MASS science publications with links to free pre-publication copies of the papers. 2MASS
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