| 释义 |
Morgan-Keenan-Kellman system Morgan-Keenan-Kellman system[¦mȯr·gən ¦kēn·ən ′kel·mən ‚sis·təm] (astronomy) An expansion of the Harvard sequence to include luminosity, whereby a roman numeral is appended to the Harvard class to indicate position on the Hertzsprung-Russell diagram: I for supergiant, II for bright giant, III for giant, IV for subgiant, and V for dwarf or main sequence. Abbreviated MKK system. |