The grahas' places
The grahas' places here come from the app's own astronomy, the planets by the VSOP87 theory and the Moon by its lunar series, sidereal by Lahiri; against Swiss Ephemeris they agree within 23″, and the Moon within 3.4″ from 1900 to 2040.
The sky the app draws and every page computes.
Rahu is the mean node, matching Swiss Ephemeris's mean node within 0.00001° from 1900 to 2100; Ketu is opposite. Every value is computed when the site is built, by the same code the app runs on the device.