A matter of time
Archie Howitt, Edinburgh
Please convey my thanks to Bev (Interactive, October 2018) for his diplomatic way of correcting my error. I have fixed my True North Solar Compass and used it to align my telescope and mount. Using the sundial time correction form at www.ppowers.com/ EoT.htm and the time correction at my local meridian, I noted that the Equation of Time (EoT) on 16 July – when I wrote my first letter (Interactive, September 2018) – was –6m 5s, and without correcting for this and my local meridian my alignment was out by 4.5°. How could I have not accounted for my local meridian? I set this every time I power up my mount. I’ve also read about the EoT but stored the information in some deep inaccessible recess of my mind. My only excuse is never trust a meteorologist – they can never get the weather right either!