› Forums › Photometry › Real-time photometry software › Mercury transit
29 September 2019 at 12:32 pm
#581413
![](https://britastro.org/wp-content/uploads/2016/11/picture-146-1478110706-80x80.jpg)
Participant
That sounds tough. A back of envelope calculation suggests ~1/32000 change (10 arcsec/30 arcmin)^2
Robin