Ramadhan and Eid ul-Fitr 1420 AH (1999/2000)

RGO criterion of crescent visibility

This page shows the probability of sighting the crescent moon at the start and end of Ramadhan using the revised Yallop criterion  as used by the Royal Greenwich Observatory (RGO). Sightability of the crescent is divided into 4 degrees of difficulty (A,B,C and D) ranging from "easily visible with naked eye" (A) to "visible with optical aid only" (D).

Start of Ramadhan

Predicted crescent visibility on the evening of 8th December 1999 according to revised Yallop/RGO criterion.

Map  produced with MoonCalc 5.0 by Dr Monzur Ahmed using Yallop's criterion of  crescent visibility. Click on map to see a full-sized version.

Crescent visibility on evening of 8th December 1999 A: easily visible with naked eye B: visible with naked eye if conditions are perfect C: may need optical aid to find crescent D: visible with optical aid only

Eid ul-Fitr

Predicted crescent visibility on the evening of 7th January 2000 according to revised Yallop/RGO criterion.

Map  produced with MoonCalc 5.0 by Dr Monzur Ahmed using Yallop's criterion of  crescent visibility. Click on  map to see a full-sized version.

Crescent visibility on evening of 7th January 2000 A: easily visible with naked eye B: visible with naked eye if conditions are perfect C: may need optical aid to find crescent D: visible with optical aid only

Related links:

Information on Islamic Calendar based on predicted moon sighting.
Information on last Eid ul-Adha and Hajj.

The maps on this page were produced by the DOS computer program MoonCalc by Dr. Monzur Ahmed.

Back to Ramadhan 1420 AH page     Back to Main Ramadhan page

Copyright © by Dr. Monzur Ahmed; last modified: 1st November 1999
monz@starlight.demon.co.uk