Io (I) occults Europa (II), 18 Aug 2009 14:25 - 14:47 UT

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Reduced Light Curve: LP-filtered measurements, signal only and normalized on Ganymede. The occultation is clearly evidant. There is a small eclipse after the occultation but the dew was a bit too much at this point.

The non normalized light curve below shows the condensation forming on the Schmidt plate of my LX90 which was pointing 20% away from the zenith for an hour.

Apertures used for the measurement:


Using WAT120N+ on low gain; 1/4 sec exposure, no focal reducer, no Barlow