Solar / Polaris Ephemeris
I do need to mark my focus setting.
But neither my instrument optics nor my eyes are of Wild quality. I recall finding Polaris one morning and watching until I couldn't see it in the scope any more about an hour after official sunrise. Maybe the air wasn't at its clearest? I'm below 1000 ft elevation. A black tube extending the sun shield made no difference. I have also set up in the evening with a good backsight angle and had to wait until 3/4 hour before sunset to find the star.
I have been using the iPhone i41CX. And I came across ASTRO*ROM for the i41CX. It returns only about 3” different than my software.
I have been using USNO AA, I get 366 days and it’s a cut and paste into Excel. I retrieve about 8, Stars, Sun, Jupiter Saturn.
The USNO web site is going offline for 6 months for "modernization". This seems to me like a totally unreasonable action, why wouldn't they leave the website up until the new one is ready?
AA USNO is online for now.
But JPL Horizons is now problematic. Is there a new URL for its web interface?