Fr.: élongation est
The position of a planet when it can be seen in the western sky just after sunset.
1) Increase in length per unit of original length.
greatest eastern elongation
bozorgtarin derâzeš-e xâvari
Fr.: plus grande élongation est
The Greatest → elongation of an inferior planet occurring after sunset.
Fr.: plus grande élongationt
The largest → elongation of an inferior planet from the Sun. It may be → greatest eastern elongation or → greatest western elongation. The greatest elongation of Mercury is about 28°, and thus Mercury can only be observed 112 minutes after sunset or before sunrise. For Venus, it is about 47°, making it visible at most about 3 hours after sunset or before sunrise.
greatest western elongation
bozorgtarin derâzeš-e bâxtari
Fr.: plus grande élongation ouest
The Greatest → elongation of an inferior planet occurring before sunrise.
Fr.: élongation ouest
The position of a planet when it is visible in the eastern sky before dawn.