# What calculations go into predicting eclipses?

*This is a followup to the question Is there a simple formula to calculate eclipse timings that you have on your website. Though I read Mr. Pandian's answer, I am still interested in seeing the "tedious" formulae for these eclipse calculations for myself. There are several pieces of software that calculate the eclipse (rather than retrieving it from a server on the Internet), and knowing the calculations necessary would indeed be helpful, as I am creating a weather model and would like to have an inderstanding of what I'm actually up against.
*

*
Only in this way can I create the piece of software I am writing.*

Eclipse calculations are a combination of orbital mechanics and the geometry of the various orbits. I have put a few equations and figures to illustrate this in this pdf document.

You will need the Adobe Acrobat Reader to view this document.

# Still Curious?

**Get More 'Curious?' with Our New PODCAST:**

- Podcast? Subscribe? Tell me about the Ask an Astronomer Podcast
- Subscribe to our Podcast | Listen to our current Episode
- Cool! But I can't now. Send me a quick reminder now for later.

**Related questions:**

**More questions about Lunar and Solar Eclipses:** Previous | Next

# How to ask a question:

If you have a follow-up question concerning the above subject, submit it here. If you have a question about another area of astronomy, find the topic you're interested in from the archive on our site menu, or go here for help.

Main Page | About Us | For Teachers | Astronomy Links | Ask a Question | View a Random Question | Our Podcast

Table 'curious.Referrers' doesn't existTable 'curious.Referrers' doesn't existURL: http://curious.astro.cornell.edu/question.php?number=503

This page has been accessed *25556* times since March 20, 2003.

Last modified: *December 19, 2005 4:00:45 PM*

Ask an Astronomer is hosted by the Astronomy Department at Cornell University and is produced with PHP and MySQL.

**Warning: Your browser is misbehaving! This page
might look ugly.** (Details)