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Дата изменения: Mon Dec 23 18:23:59 2013
Дата индексирования: Fri Feb 28 21:09:13 2014
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Поисковые слова: mercury surface

HyperLEDA documentation: parameter: compactness

Compactness parameter: compactness

The parameter compactness is set to C or D if respectively a galaxy was reported as beeing "compact" or "diffuse" in the litterature or in catalogues.
This parameter has been determine for only a fraction of the galaxies in the database and therefore the absence of compactness does not indicate that a galaxy is neither "compact" nor "diffuse".
There are 4874 galaxies with compactness=D and 4304 with compactness=C in the database (May 2003 version).

HyperLeda

Questions: prugniel@obs.univ-lyon1.fr