Without any intent to provoke controversy, attached is world map of crescent visibility on 19 Sep 2009.
The color coding is as following.
• Red: It is impossible to see the crescent from the areas located under the red color. Because either the Moon on this day sets before the Sunset and/or the topocentric conjunction occurs after the Sunset.
• White: The crescent can not be seen from uncolored areas, even though the Moon sets in these locations after the Sunset and the topocentric conjunction occurs before the Sunset, but the Moon is not sufficiently illuminated in order to be seen as crescent even by optical aid.
• Blue: The crescent is expected to be seen by optical aid only from the areas located under the blue color.
• Magenta: The crescent is expected to be seen by optical aid from the areas located under the magenta color. In these areas the crescent could be seen by naked eye if the atmospheric conditions are superb and the observer is experienced.
• Green: The crescent is expected to be easily visible by naked eye from the areas located under the green color.
(the map was generated using software "Accurate Times" available at
http://www.icoproject.org/accu_setup.exe)
