Visibility of the New Moon at Two Sites. I: Maryland Situated at Northern Geographical Latitude. II: Sacramento Peak Situated at High Altitude above Sea Level
Abstract
The optimum conditions to see the crescent of the new Moon have been obtained at Sacramento Peak and Maryland. We have used the data of the sky twilight brightness given by Koomenet al. (1952) for the two sites. The results show that the crescent can not be seen at the two sites for sun's depression less than 4° and 8° elongation between Sun, Moon and Earth confirming the results obtained before by Asaadet al. (1976). The visibility conditions at Maryland and Sacramento Peak are better than that obtained before for the three sites Misallat, Helwan and Daraw at Egypt. The reason is mainly due to the decrease in the sky twilight brightness at sites having higher geographical northern latitudes and high elevation above sea level.
- Publication:
-
Earth Moon and Planets
- Pub Date:
- January 1995
- DOI:
- 10.1007/BF00619454
- Bibcode:
- 1995EM&P...70...93M