Augurine

Hello, I’m the developer. Between July and October I made several changes to these calculators and didn’t announce them, which I should have done, and I'm sorry it made you lose trust in the website. What you noticed traces to four changes:

That one is the asteroids. The Sun, Moon and planets come from JPL’s DE440 planetary ephemeris and were not part of this. Asteroid positions used to come from a simpler orbital model, which is accurate near the present and drifts for dates decades in the past. On October 20 I moved the asteroids to JPL Horizons data, so they now have the same quality of source as the planets. Positions shifted as a result, in some charts by enough to change a sign or a house, and aspects to those asteroids shifted with them.

The other aspect differences are display changes. In July I simplified the chart aspect tables to lead with the major aspects and list the first twelve asteroid contacts. In August the aspect calculators stopped including asteroids and lots. The remaining aspects are still calculated but no longer listed. I'm going ahead as I'm writing this to give more flexibility on that.

The heliacal rising calculator was refined twice. Since August each star’s date is computed with that star’s own visibility threshold (its arcus visionis), where before all stars shared one. That moves some dates by a few days, Regulus among them. Since October the 7-day rule applies only to planets, following the Hellenistic doctrine of planetary phasis it comes from, so fixed stars no longer carry that flag. “Estimated” is a label I added because a heliacal rising depends on local sky conditions, and any computed date is an approximation.

If you send me the chart you compared, I’ll go through any remaining differences with you: support@augurine.com