Lunar eclipse, penumbral magnitude and umbral magnitude

[jibdata]

Hi,

I love your library and it has helped me a lot with astronomical computation in Node.js. I don't know if this is a bit sidetracked with the intention of the Astronomy Engine, but would it be possible to include penumbral magnitude and umbral magnitude when searching (SearchLunarEclipse) for eclipses? And when the eclipse is at its maximum for an observer? Maybe a new function that can be called with the eclipse data and the observer, or a SearchLocalLunarEclipse function that is called with date and observer (i.e the SearchLocalSolarEclipse).