When to Observe Jumadal Thani Waning (OLD) Crescent ?
The geocentric conjunction (Geocentric New Moon) will occur Inshalla on (Saturday 14 July 2007) at
12:04 UT.
Sighting the OLD crescent on (Friday 13 July 2007) and on (Saturday 14 July 2007) is shown in the below graphs using the program Accurate Times by Mohammad Odeh according to Odeh criterion. Where:-
- It is impossible to see the OLD crescent from the areas located under the red color. Because either the Moon on this day rises after the Sunrise and/or the topocentric conjunction occurs before the Sunrise.
- The crescent is expected to be seen by optical aid only from the areas located under the blue color.
- 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.
- The crescent is expected to be easily visible by naked eye from the areas located under the green color.
- The crescent can not be seen from uncolored areas, even though the Moon rises in these locations before the Sunrise and the topocentric conjunction occurs after the Sunrise, but the Moon is not sufficiently illuminated in order to be seen as crescent even by optical aid.
- Kindly notice that the below graph shows the possibility of seeing the crescent from areas between 60 degrees north of Equator down to 60 degrees south of Equator.
Friday 13 July 2007
Saturday 14 July 2007
Jumadal Thani Waning (OLD) Crescent Observation Results
Friday 13 July 2007:
- Indonesia: Seen: ICOP member Mr. Ma'rufin Sudibyo said: "The waning crescent sighting had done in Kebumen, Central Java, Indonesia (7deg 40min N 109deg 38min E, 21 m ASL, time zone = GMT + 7) at July 13th, 2007 this morning. The sky was covered by thin cloud until altitude nearly 5 degrees and eastern horizon was hidden by haze, so we had horizontal visual range only 1 km, approximately. We used naked eye for observation, and helped by callibrated internal clock Siemens C55. We also used Moon Calculator v6.0 developed by Dr. Monzur Ahmed for obtaining a table of crescent altitude vs. local time. The waning crescent had seen obscurely when we started our observation at 05:10 local time, with altitude nearly 5 degrees. Be sides the crescent, eastern and southern sky was adorned by Mars and Achernar (alpha Eridanus) as faint point light source in altitude nearly 60 degrees, respectively. The crescent had specific arc shape but with cloudy environment we couldn't identify real orientation of the arc. The crescent was seen until 05:20 local time when it was hidden by cloud, where it had elements: altitude 8,7 degree; relative altitude 17,8 degree, relative azimuth 9,3 degree, elongation 20 degree; visual magnitude -6 and phase 3,31 %. Until we finished our observation at sunset time (05:59 local time), situation hasn't changed."
- Iran:
- Seen: ICOP member Mr. Alireza Mehrani mentioned that he was able to see the crescent by naked eye.
- Seen: ICOP member Mr. Majid Marzani said: "The crescent was seen by naked eyes. The Sky Near The Eastern Horizon Was Clear."
- Kuwait: Seen: ICOP member Mr. Hussain Khushaish said: "In Kuwait on Friday mornning 13 July 2007 I saw the old crescent in the following order: Moon rise at 3:21, first seen with bino at 3:38, first seen with naked eyes at 3:39, last seen with naked eye at 4:50, sun rise at 4:57, last seen with 20*60 binocular at 5:19."
- Lebanon: Seen: ICOP member Dr. Raad Ahmad mentioned that he was able to see the crescent by naked eye and Dr. Ahmad mentioned that the atmospheric conditions were superb.

By Dr. Raad Ahmad