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Earthshine blog

"Earthshine blog"

A blog about a telescopic system at the Mauna Loa Observatory on Hawaii to determine terrestrial albedo by earthshine observations. Feasible thanks to sheer determination.


Observing log Posted on Mar 19, 2012 05:12PM

Extraordinary night – followed the Moon from moonrise until dawn. Clearest night we have had yet. Halo almost non-existent on DS.

This shows that we may be able to get very good data very close to the Sun – but in that case extreme refraction would have to be handled. Will look into whether this can be achieved from the JPL ephemeris. Exposure time also needs to compensate for the strong extinction through 5-10 airmasses. Not sure how to do that without stopping and starting scripts.

Data inventory March 2012

Observing log Posted on Mar 19, 2012 01:43PM

As of March 18 2012 we have 78.000 images of the Moon, of which 51.510 are relevant for data-reduction with the current techniques at hand.

Distribution across lunar phases is seen here: