2MASS

The Two Micron All-Sky Survey, or 2MASS, was an astronomical survey of the whole sky in the infrared spectrum and one of the most ambitious projects to do so. It took place between 1997 and 2001, in two different locations at the U.S. Fred Lawrence Whipple Observatory on Mount Hopkins, Arizona (G91), and at the Cerro Tololo Inter-American Observatory in Chile (I02), each using a 1.3-meter telescope for the Northern and Southern Hemisphere, respectively. It was conducted in the short-wavelength infrared at distinct frequency bands near 2 micrometres (or microns), from which the photometric survey with its HgCdTe detectors derives its name.

2MASS

The Two Micron All-Sky Survey, or 2MASS, was an astronomical survey of the whole sky in the infrared spectrum and one of the most ambitious projects to do so. It took place between 1997 and 2001, in two different locations at the U.S. Fred Lawrence Whipple Observatory on Mount Hopkins, Arizona (G91), and at the Cerro Tololo Inter-American Observatory in Chile (I02), each using a 1.3-meter telescope for the Northern and Southern Hemisphere, respectively. It was conducted in the short-wavelength infrared at distinct frequency bands near 2 micrometres (or microns), from which the photometric survey with its HgCdTe detectors derives its name.