Mercury transit in H-Alpha
On November 11th 2019 there was a quite rare astronomical event: planet Mercury was transiting over the Sun disk. A tansit (that's the precise name for this astronomical event) like this can only happens about 13 times a century. Weather was far from ideal in all Europe and this brought me to a 5h drive in search of clear skies which were found near San Salvo (CH), Italy.
William Optics Megrez 90mm and Daystar Quark Cromosphere. ZWO ASI 174MM. Partially cloudy sky and bad seeing