› Forums › Photometry › Real-time photometry software › Transit of Mercury?
28 September 2019 at 11:01 pm
#581410
![](https://britastro.org/wp-content/uploads/2014/01/picture-3-1390618709-80x80.jpg)
Keymaster
James: I had been wondering about doing something similar on 11 November. Set a DSLR to take frames of fixed exposure, pointed either at the sky, or in fact at the ground. Averaging the brightness across the frame, I wonder how easy it would be to detect a brightness step at Mercury’s ingress and egress from transit…