Astrophysics (Index)About

luminosity class

(Morgan-Keenan luminosity class, MK luminosity class, MK class)
(classification of size/luminosity of stars)

A star's luminosity class (or Morgan-Keenan luminosity class or MK luminosity class or MK class) is a classification (star class) of the overall size of a star (as are terms like giant star, supergiant, etc.) which is a major contributor to its luminosity. A description of a star might include its spectral type and luminosity class. The general classifications are indicated by Roman numerals:

Additional classification:

The system is termed the Morgan-Keenan classification system.


(stars,classification,luminosity)
Further reading:
http://en.wikipedia.org/wiki/Stellar_classification
http://astronomy.swin.edu.au/cosmos/M/Morgan-Keenan+Luminosity+Class

Referenced by pages:
astronomical quantities
main sequence star (MS)
spectral type
stellar astronomy
subdwarf (sd)

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