How can I track Earth's distance to the sun on a specific date?

[qntty]

A few weeks ago I saw a web page (I believe it was at NASA) that allowed you to enter a date and see Earth's distance to the sun on that date. I searched but can't find the site again, does anyone know where I can find this page?

 

[Janus]

Try here:

http://ssd.jpl.nasa.gov/horizons.cgi

Just change the target body to the Sun. The distance will be listed as "delta" in AU.

 

[qntty]

Thanks!