Two Micron All Sky Survey (H-Band)

2MASS data were collected by uniformly scanning the entire sky in three near-infrared bands to detect and characterize point sources brighter than about 1 mJy in each band, with signal-to-noise ratio (SNR) greater than 10, using a pixel size of 2.0". This achieves an 80,000-fold improvement in sensitivity relative to earlier surveys.

2MASS used two new, highly-automated 1.3-m telescopes, one at Mt. Hopkins, AZ, and one at CTIO, Chile. Each telescope is equipped with a three-channel camera, each channel consisting of a 256 by 256 array of HgCdTe detectors, capable of observing the sky simultaneously at J (1.25 microns), H (1.65 microns), and Ks (2.17 microns).

2MASS images and other data products can be obtained at the NASA/IPAC Infrared Science Archive

Metadata Access
Creator The Two Micron All Sky Survey is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center, funded by the National Aeronautics and Space Administration and the National Science Foundation.
Contributor International Virtual Observatory Alliance (IVOA)
Publication Year 2020
OpenAccess true
Contact SkyView Help <Skyview(at)>
Resource Type AstroImage
Format text/xml+votable
Discipline Astrophysics and Astronomy