Photometric systems

the determination of light intensities of astronomical bodies, including stars

numerical expression that determines the color of an astronomical object

multi-spectral imaging and spectroscopic redshift survey

thumb|2MASS J band (infrared)|J-band image. The [[brown dwarf 2MASS J17111353+2326333 is highlighted.]]

wide-band photometric system used in astronomy

set of well-defined passbands (or filters), with a known sensitivity to incident radiation

medium-band photometric system used in astronomy

Stars that have had their light output measured carefully

sequence of stars defining stellar magnitudes and colors